deoxigenated blood returns to the heart via the vena cava. where does the blood go from the vena cava
a. left ventricle
b. left atrium
c. right ventricle
d. right atrium ​

Answers

Answer 1

Answer:

D

Explanation:


Related Questions

Female African elephants are, on average, 7 - 9 feet tall. What is the upper end of this range in centimeters?
Note that 1 in. = 2.54 cm, 100 cm = 1 meter and 12 in. = 1 ft.

Answers

9 feet = 274.32 centimeters

PLEASE ANSWER WILL GIVE BRAINLIEST
The figure below demonstrates the relationship between photosynthesis and respiration. What products at B are reactants for C?


a. 6H2O + C6H12O6

b. C6H12O6 + 6O2

c. 6CO2 + 6H2O

d. C6H12O6 + 6CO2

Answers

[tex]\huge{ \mathfrak{  \underline{ Answer} \:  \:  ✓ }}[/tex]

Correct option is B.[tex]C_6H_12O_6 + 6O_2[/tex]

Because, the products formed after photosynthesis are Glucose and Oxygen, which again reacts during respiration to release Energy.

_____________________________

[tex]\mathrm{ \#TeeNForeveR}[/tex]

Answer:

b. C6H12O6 + 6O2

Explanation:

That process is called respiration where glucose reacts with oxygen to form water, carbondioxide and ATP ( energy )

what part of a virus that contains the instructions for making new viruses

genetic material


active


inactive


vaccines


over-the-counter medications


ability to multiply

Answers

Answer:

ability to multiply

Explanation:

the more they multiply the more they can spread and that's how they can get more instructions to make it worse like coronavirus right now you can give it from person to person because the virus knows it can multiply and transfer over to another human being for germs or touch

You are hired by Murphey Farms to decrease the backfat in their hogs. The current hog population has a mean backfat content of 20.2mm. You selected the hogs with the smallest amount of backfat, mated them and obtained the progeny generation. The selected hogs had a mean backfat content of 9.5mm. You know that the heritability for percent backfat in hogs is 0.47.
1. What is the selection differential? Round your values properly to 2 decimal digits.
2. What is the expected response to selection? Round your values properly to 2 decimal digits.
3. What is the expected mean of the progeny generation? Round your values properly to 2 decimal digits.

Answers

Answer:

SD = -10.7 R = -5.3X₁ = 14.9 ≅ 15mm

Explanation:

Before answering the question, we need to know a few concepts.

Artificial selection is the selecting practice of a specific group of organisms in a population -that carry the traits of interest- to be the parents of the following generations.  

Parental individuals carrying phenotypic values of interest are selected from the whole population. These parents interbreed, and a new generation is produced.  

The selection differential, SD, is the difference between the mean value of the trait in the population (X₀) and the mean value of the parents, (Xs). So,  

SD = Xs - X₀    

Heritability in the strict sense, h², is the genetic component measure to which additive genetic variance contributes. The heritability might be used to determine how the population will respond to the selection done, R.  

h² = R/SD

The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h², with the selection differential, SD.  

R = h²SD  

R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),  

R = X₁ - X₀  

-------------------------------------------------------------------------------------------------------------

Now that we know these concepts and how to calculate them, we can solve the proposed problem.

Available data:  

• You are decreasing the backfat in the hogs.

• The hog population mean backfat content = 20.2mm → X₀

• The selected hogs had a mean backfat content of 9.5mm → Xs  

• Heritability is 0.47 → h²

According to what we sow previously, we need to find out the value of X₁, which reflects how tall the new generation of corn will grow.  

• We know that R = X₁ - X₀, so we need to clear this formula to calculate X₁

X₁ = R + X₀  

We already know that X₀ = 20.2mm  

Now we need to calculate R.  

• R = h²SD  

We know that h² = 0.47,  

Now we need to calculate SD

• SD =  Xs - X₀  

Xs = 9.5mm → Parentals media height

X₀ = 20.2mm → Population media Height

SD = Xs - X₀  

SD = 9.5 - 20.2

SD = -10.7  

Knowing this, we can calculate R

R = h²SD

h² = 0.47  SD = -10.7

R = 0.47 x -10.72

R = -5.3

Finally, once we know the R-value we can calculate the X₁ value

X₁ = R + X₀

X₁ = -5.3 + 20.2

X₁ = 14.9 ≅ 15mm

how might a sudden rise in CO2 in the blood affect the gas exchange process ?

Answers

Answer:

process is faster

Explanation:

when CO2 accumulates in the blood it causes homeostatic imbalance eg it causes a fall in blood pH therefore gaseous exchange takes place faster to rid the body of this gas maintaining balance in the body

Answer true or false to the following statements. Use the graphic on the
back to determine the answers.
1. ______ Dogs belong to the order Felidae.
2. ______ A fox belongs to the phylum Arthropoda.
3. ______ Snakes belong to the phylum Reptilia.
4. ______ Lions belong to the class Mammalia.
5. ______ All arthropods belong to the Class Insecta.
6. ______ All rodents belong to the phylum Chordata.
7. ______ All amphibians belong to the class Reptilia.
8. _______ All primates are mammals.
9. _______ The class mammalia includes dogs, cats and rats.
10. ______ A lion belongs to the genus Felis.
11. ______ All mammals are primates.
12. ______ Insects and lobsters are arthropods

Answers

Classification is crucial as it allows grouping anything into specific categories.

The taxonomic hierarchy of classification is,

speciesgenusfamilyorderclassphylumkingdom

Explanation:

Dogs belong to the order Felidae - FALSE

        Dogs belong to the order Carnivora.

A fox belongs to the phylum Arthropoda - FALSE

         Fox belongs to the phylum Chordata

Snakes belong to the phylum Reptilia - FALSE

         Snakes belong to the phylum Chordata and class Reptilia

Lions belong to the class Mammalia - TRUE All arthropods belong to the Class Insecta - FALSE

         Arthropods are invertebrate animals with an exoskeleton, segmented body, and jointed appendages. Although most of the arthropods are insects there are some exceptions like King crabs, Lobster, and Shrimp.

All rodents belong to the phylum Chordata - TRUE All amphibians belong to the class Reptilia - FALSE

        Amphibians have their class called amphibia and the class reptilia include a different class of organisms called reptiles.

All primates are mammals -TRUEThe class Mammalia includes dogs, cats, and rats -TRUEA lion belongs to the genus Felis - FALSE

       Lion belongs to the genus Panthera

All mammals are primates - FALSE

        A Primate is a placental animal that is characterized by having distinguished hands and feet and a well-developed brain. Examples are Apes and humans.

Whereas a mammal is a warm-blooded vertebrate animal. They include humans, lions, apes, dogs, etc.

Hence all primates are mammals but all mammals are not primates.

Insects and lobsters are arthropods - TRUE

Which factors that affect personal health are the most easily controlled?
a.
genetic
b.
environmental
c.
lifestyle
d.
global

Answers

Its C because your lifestyle is a choice

Answer:

c. lifestyle

Explanation:

There are many things that can affect a person's health but not all can be controlled. For example, genetics are what people are born with and cannot be changed. Additionally, global and environmental situations can change but it takes an entire community; so, one individual cannot change these factors. However, one person can change their own lifestyle, assuming they have the willpower.

please help me I don't really understand

Answers

Answer:

  .

Explanation:

Plant and animal cells are both eukaryotic cells. However, the functions of the different cells require that they have different
organelles. What are the specialized structures found in plant cells, but NOT animal cells? Select ALL that apply.
A)
cell wall
B)
centrioles
C)
chloroplasts
D)
cell membrane
E)
central vacuole

Answers

Answer:

A, C, E

Explanation:

Plant cells have specialized structures which are absent in animal cells. These include cell wall, chloroplasts, and central vacuole. Thus, correct options are A, C, and E.

What is a Plant Cell?

Plant cell is the basic unit of all plants. Plant cells have unique organelles which are absent in animal cells. These organelles are responsible for specific functions which are important for the normal functioning of plant cell.

Plant cells have a unique cell wall which is absent in animal cells. Cell wall is made up of cellulose which is responsible for providing strength to the cells. Plant cells also have a chloroplast which contain a special pigment called chlorophyll. This pigment is responsible for photosynthesis. This organelle is absent in animal cells.

A large vacuole is also found in plant cells which is absent in animal cells. The vacuole contains reserved food material in the form of starch which is used in the unfavorable condition.

Therefore, the correct options are A, C, and E.

Learn more about Plant cell here:

https://brainly.com/question/1493437

#SPJ2

In which of the following scenarios would evolution by natural selection take place? (1 point)
O Microorganisms reproduce asexually, producing identical offspring
O Corn is genetically modified and cloned to make identical crops
O Penguins reproduce sexually, producing offspring that look different from one another
O A banana tree branch is planted, producing a clone of the parent tree

Answers

.......1st option’s right

Evolution by Natural selection occurs when the offspring of genotypes are produced in response to the environment. Hence the correct option is C  Penguins reproduce, offspring that look different from one another.

Evolution by Natural Selection

Charles Darwin and Alfred Russel Wallace developed the theory of Evolution by Natural Selection. For evolution by natural selection take place, Darwin described four essential conditions, these are:

Trait selection must be variable in the populationThe trait must be heritableThe struggle of existenceThe organism which fits to its environment.

As per the question, penguins produced offspring that look different from another, this must be because of the evolution by Natural selection. Hence the correct option is C.

Learn more about Evolution by Natural Selection here:

https://brainly.com/question/1144962

PLS help

explain the effects of the use of antibodies in the control of a disease

i will give brainly

Answers

Answer:

this website make summery about antibodies https://www.mblbio.com/bio/g/support/method/antibody-role.html#:~:text=Antibodies%20have%20three%20main%20functions,holes%20in%20the%20cell%20wall).

Three main functions of antibodies are provided:

1) Blood and mucosal antibodies are secreted and bind to foreign substances such as pathogens and toxins, which they inactivate (neutralization).
2) Antibodies activate an additional system for lysis destruction of bacterial cells (punching holes in the cell wall).
3) The phagocytosis of foreign substances is facilitated by phagocytic cells by antibodies (opsonization).

If a virus infects a human being, it invades his host cells to survive and replicate. Once inside, the immune system cells are unable to 'see' the virus and they do not know that the host cell is infected. In order to overcome these facts, cells employ a system that allows other cells to display what lies within them they use class I molecules known as the major histocompatibility complex proteins (or MHC class I for short). When the cell is infected with a virus, fragments of proteins made by a virus will appear in those pieces of peptide.

A special immune cell known as a T-cell is circulating in search of infections. One type of T cell is called a cytotoxic T cell by killing cells infected with toxic mediators by viruses. Cytototoxic T cells have on their surface specialised proteins to help virally infected cells recognise. These proteins are called receptors of cells T. (TCRs). Each cytotoxic T cell is TCRed, with which the antigenic peptide bound with an MHC molecule is specifically recognised. When a virus peptide can be detected by the T cell recipient, its T cell is warned that it will be infected. The T cell releases cytotoxic factors to kill the infected cell, thus preventing the infection from surviving.


Hope this helps!!

Why will individuals have brown eyes rather than a blue eyes?
Question 6 options:


a)


Brown eyes is a mutation.


b)


Blue eyes is recessive.


c)


Blue eyes is dominant.

Answers

Blue eye is a recessive gene

Cross a white feathered chicken with a checkered chicken (checkered chicken, checkered chicken!). Show the genotypic and phenotypic ratios.

Answers

Answer:

The correct answer would be -

genotype - 50% WB and 50% WW

phenotype - 50% checkered chicken and 50% white-feathered chicken.

Explanation:

In the chickens, the checkered trait occurs due to the codominance type of inheritance as when two different alleles of color Black feather and White feather allele present together they both show their presence and express as checkered chicken.

White feather chicken: WW

Black feather chicken: BB

Checkered chicken: WB

Cross = WW and WB

gametes: W, W and W, B

Punnett square:

      W      W

W    WW   WW

B    WB     WB

Thus, The correct answer would be -

genotype - 50% WB and 50% WW

phenotype - 50% checkered chicken and 50% white-feathered chicken.

Answer:

The correct answer would be -

genotype - 50% WB and 50% WW

phenotype - 50% checkered chicken and 50% white-feathered chicken.

Explanation:

1. (a) List the 5 conservation related conventions. (b) Which one of these conventions is more embracing? Give reasons for your answer in relation to ecology​

Answers

The five conservation related conventions are:

1. Convention on Biological Diversity

2. Convention on International Trade in Endangered Species of Wild Fauna and Flora

3. Convention on Migratory Species

4. Ramsar Convention on Wetlands

5. Convention on the Conservation of Antarctic Marine Living Resources

The Convention on Biological Diversity is the most embracing of these conventions, as it provides the most comprehensive coverage of conservation related issues. Its focus is on the conservation of biodiversity, sustainable use of resources, and the fair and equitable sharing of benefits arising from the use of genetic resources. Additionally, it provides strategies and commitments to ensure that exploitation of living resources is done with sustainability and responsibility, bringing it into line with the principles and goals of ecological conservation.

What do lymph and blood have in common? AThey're both part of the lymphatic system BThey both transport nutrients to cells throughout the body They're both purified by lymph nodes They're composed largely of blood plasma

Answers

Answer:

They're composed largely of blood plasma

Explanation:

A. The boiling point of the water is 100°C. Where are 100 degrees Celsius?

Located

On the thermometer on the right?

HELP ME, PLEASE!!!


A. O ponto de ebulição da água é de 100°C. Onde estão 100 graus Celsius
localizados
no termômetro à direita?

ME AJUDEM POR FAVOR!!!

Answers

The boiling of water is an example of physical change. The boiling point is when the vapor pressure of the liquid is equal to the vapor pressure of the surrounding. For water, this occurs at 100oC 100 o C , at sea level.

Which cell structure is represented by the seed in the center of the avocado?
A. Nucleus
B. Cell membrane
C. Cell wall
D. Cytoplasm

Answers

Answer:

A

Explanation:

Answer:

A. Nucleus

Explanation:

The avocado seed is a hard, massive core in the center of the fruit, just like the nucleus in a cell.

Match each of the "4Rs" to the statement that best describes it.

Answers

Answer:

47

Explanation:

Yes it is 690.00 hoepnthsi hekls

The length of a DNA double helix increases by 0.34 nm (nanometres) for every pair of nucleotides. The total number of nucleotides in a human body cell is
[tex]1.2 \times {10}^{10} [/tex]
Calculate the total length of a double helix in a human body cell (answer to be given in meters)​

Answers

Answer:

If you multiple 1.02 × 2 = 2.04 meter, it is the total length of DNA in human diploid cells.

Explanation:

7. The fossil record contains fossils from
many geologic ages. Fossils enable
scientists to piece together what ancient
organisms looked like. Which of these
answers best describes how fossils in
the fossil recomhare classified?
A by ages and physical similarities
B by whether the fossil contains hard
or soft tissues
C by size and the type of rock in which
they are found
D. by similarities in their DNA and in the
minerals they contain

Answers

Answer:

a

Explanation:by ages and physical similarities

How would decreasing the amount of water in blood affect blood pressure

Answers

Dehydration is a potential cause of low blood pressure (hypotension) due to decreased blood volume resulting in decreased pressure against artery walls. However, did you know not drinking enough water can lead to high blood pressure? When you do not drink adequate water the body will compensate by retaining sodium. Hope this helped!

Answer:

Blood pressure would decrease.

Explanation:

If you don't drink enough water it's bad for your body since water is a source of living, and if you decrease the amount of water in your blood the blood pressure would decrease.

Which of these body systems has cells that attach to each other to form a leak-proof barrier?

Select one:

Urinary system.

Reproductive system.

Respiratory system.

Endocrine system.

Answers

Answer:

Epithelial cells are tightly packed, and this lets them act as barriers to the movement of fluids and potentially harmful microbes. Often, the cells are joined by specialized junctions that hold them tightly together to reduce leaks.

Explanation:

The process that shows how the plant grow lives and dies is called ​

Answers

Answer:

morphogenesis

Explanation:

The developmental process is known as morphogenesis. This process that follows a plant throughout its entire life and shows how the plant shapes itself through the development of cells, tissues, and organs throughout its life. These developments are dependent on many factors such as the genetics of the plant as well as the environmental conditions that the plant is exposed to. All of this affects the type of organs that the plant develops such as leaves, flowers, and fruits.

A) The three levels of biodiversity are genetic diversity, species diversity, and ecosystem diversity. Explain the three levels of biodiversity and the concerns associated with loss of diversity at each level.

B) Species and genetic diversity can be very beneficial to humans. Describe three ecosystem services that nature provides to humans.

Answers

Answer:

Biodiversity or Biological diversity is a term that describes the variety of living beings on earth. It is described as degree of variation of life. Biological diversity encompasses microorganism, plants, animals and ecosystems such as coral reefs, forests, rainforests, deserts etc.

-In biodiversity, each species, no matter how big or small has an important role to play in ecosystem. It represents the wealth of biological resources available to us. It’s all about the sustaining the natural area made up of community of plants, animals, and other living things that is begin reduced at a steady rate as we plan human activities that is being reduced by habitat destruction.

Explanation:

A) The three levels of biodiversity are genetic diversity, species diversity, and ecosystem diversity.

B) Ecosystem services provided by biodiversity include pollination, pest control, and nutrient cycling.

A) The three levels of biodiversity are genetic diversity, species diversity, and ecosystem diversity. Genetic diversity refers to the variation in genes within a species, which allows populations to adapt and survive in changing environments. Concerns associated with the loss of genetic diversity include reduced adaptability to environmental changes and increased vulnerability to diseases.

Species diversity refers to the variety of different species within an ecosystem. Loss of species diversity can disrupt ecological balance, impact food webs, and lead to the extinction of keystone species. It can also result in the loss of potential sources for medicines, agricultural crops, and other valuable resources.

Ecosystem diversity refers to the variety of different ecosystems in a region. Loss of ecosystem diversity can result in habitat loss, fragmentation, and degradation, leading to the decline or loss of specialized species adapted to specific habitats. It can also impact the provision of ecosystem services, such as water purification, climate regulation, and nutrient cycling.

B) Species and genetic diversity provide several ecosystem services to humans. One example is pollination, where diverse species of pollinators, such as bees, butterflies, and birds, ensure the reproduction of flowering plants and agricultural crops. Another ecosystem service is pest control, where diverse predator species help regulate populations of agricultural pests.

Ecosystems also provide the service of nutrient cycling, where diverse decomposers, such as fungi and bacteria, break down organic matter and recycle nutrients back into the soil. This process is crucial for maintaining soil fertility and supporting plant growth. Lastly, diverse ecosystems contribute to climate regulation by absorbing and storing carbon dioxide, a greenhouse gas that contributes to climate change.

Overall, species and genetic diversity support the functioning and resilience of ecosystems, benefiting human well-being by providing essential services like pollination, pest control, nutrient cycling, and climate regulation. Protecting and conserving biodiversity is essential for maintaining these services and ensuring a sustainable future.

To learn more about genetic diversity, here

https://brainly.com/question/29766851

#SPJ6

HELP LIMITED TIME!!!!!!!!!
Solar, wind, wave, and nuclear energy are all ways of producing
energy without producing the negative outcome of:

Select one:

1, Decreased oxygen levels
2, Habitat loss
3, Increased greenhouse gas emissions
4, Non-native species

Answers

Answer:

3. Increased greenhouse gas emissions

Explanation:

Solar, wind, wave, and nuclear energy are all ways of producing energy without producing the negative outcome of increased greenhouse gas emissions. Greenhouse gases, such as carbon dioxide and methane, are released into the atmosphere through the burning of fossil fuels, such as coal, oil, and natural gas. These gases trap heat in the atmosphere and contribute to global warming and climate change. Solar, wind, wave, and nuclear energy, on the other hand, are forms of renewable energy that do not produce greenhouse gases when they are generated. They are considered more environmentally friendly alternatives to fossil fuels, and their use can help to reduce greenhouse gas emissions and mitigate the impacts of climate change.

Plz help me well mark brainliest if correct!!....

Answers

Answer:

The answer is D (last one)

Explanation:

The answer is B :) hole that helps because in the coordinate plan

which population dispersal pattern is the most common?
A. Clumped
B. Random

Answers

Clumped

Clumped distribution is the most common type of dispersion found in nature. Often this type of distribution is due to an uneven distribution of nutrients or other resources in the environment.

Answer:

A. Clumped

Explanation:

There are 3 common distribution patterns, namely clustered, evenly distributed, and random. The characteristics of the clustering distribution pattern are based on an individual's instinct to gather near their food source

[tex] \blue {Hashibira}[/tex] [tex] \\ [/tex] [tex] \blue {Inosuke}[/tex]

explain how energy carried by a light and sound wave with those properties

Answers

The fact that both light & sound are waves of energy is among the most crucial things to comprehend about both.While sound waves & light waves both travel as waves and are manifestations of energy, they differ significantly in important ways.Light and sound travel at very different rates.

How are the energies of sound and light similar?

Both light and sound energy travel as waves, which is how they are comparable to one another.They have such a wavelength, amplitude, and frequency, to put it another way.

How do light & sound waves connect to energy?

The fact that both light & sound are waves of energy is among the most crucial things to comprehend about both.

To know more about  energy carried visit:

https://brainly.com/question/9624826

#SPJ1

Which of the following is not an example of income?
answer-food

Answers

Answer:

food

Explanation:

Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the content of your paragraph.

Submit your recorded observations for each step.
Step 1: Burning Candle - record the mass and write your observations

Step 2: Cooling Candle - record the mass and write your observations

Step 3: Tearing paper - record your observations

Step 4: Wet paper - record your observations

Step 5: Burning pieces of paper - record your observations

Step 6: Salt and water in test tube - record your observations

Step 7: Baking soda and vinegar - record your observations

Answer the following questions.
What is the difference between a physical change and a chemical change?
What kind of change occurred in each test? What evidence do you have to support your decision? Be brief, but be sure to defend your conclusion with data.

Answer and ill give brainly

Answers

Here the physical changes are seen in the burning candle, cooling candle, tearing paper, wet paper, salt, and water in the test tube, while the chemical reactions are involved in the burning of the paper and the mixing of the vinegar with soda.

What are the physical and chemical changes?

The physical change is the change in form, such as when the candle is burned or cooled down, then the wax that is formed has the same properties as the candle, or the paper pieces after being torn have the same properties. Chemical changes involve the formation of new things, such as when paper is burnt, this produces ash with a different chemical nature, and when the vinegar and soda is mixed, it produces a different product.

Hence, here the physical changes are seen in the burning candle, cooling candle, tearing paper, wet paper, salt, and water in the test tube, while the chemical reactions are involved in the burning of the paper and the mixing of the vinegar with soda.

Learn more about the physical and chemical changes here.

https://brainly.com/question/11321843

#SPJ1

Other Questions
What is wrong with the sentence - The secretary of state whose appointed by the president of the United States is the country's chief adviser on foreign affairs A cylinder has a volume of 105 cubic centimeters. What is the volume of a cone with the same base and height?315 am210 cm70 cm35 cm At the candy store, Julie found a special scale that would measure the number of pounds, p, of candy and then calculate the cost, c, when you typed in the name of the candy. For her favorite candy, chocolate gummy bears, she wrote this table. p c0.25 1.690.45 3.040.75 5.061.25 11.81Choose all of the following statements that are true.Select one or more:a.A reasonable domain is [-1, 100]b.A reasonable domain is (0, 50] .c.c = 6.75pd.none of thesee.A reasonable range is [0, 20]. If a borrower wishes to borrow 90% of the $250,000 purchase price, which of the following equals one discount point?A) $3,000B) $2,500C) $2,250D) $2,000 PreAn outdoor art display is a metal cube with edge length 66 feet. What is the volume of the cube incubic feet? A storm that moved through several states at a speed of 60 miles per hour affected 219 miles of land. What did that make the storm For polynomial function f, if f(3)=5 and f(5)=-2, what do we know about any roots of f(x)? The bill is 42 dollars, taxes is 9%, and the tip given is 18%. What's the Total? If LaL turns into a gel when exposed to a sample, it means the sample is contaminated with gram-negative bacteria What is the value of the expression below ifx = -5, h = -5, and y = -3.3-h(x+4)-2y Three workers are digging a hole. They work one by one, and every single of them works exactlythe amount of time it would have taken the other two to complete the digging of the entire hole.They finish digging the hole by taking one turn each. How many times faster would they havedigged the hole if they worked together?(A) 2.5 (B) 3 (C) 3.5 (D) 4 (E) 5 Why do you think a composer would want to alter or highlight a rhythm or a tone? Ravi is driving her car, hits a patch of ice, and momentarily loses control of the vehicle. Despite spinning in a full circle, Ravi manages toavoid hitting any objects and drives away unharmed. Ravi experiences a surge of adrenaline and a racing heartbeat to due to the activationof which of the following?O sympathetic nervous systemO parasympathetic nervous systemO thyroid glandO somatic nervous systemO pancreas solve for y1/8y-2/3=5.5 Use the table to convert the following unit length as indicated. Choose the right answer. 1,000 yards to kilometers Jeremy is going on rides at a carnival he starts the rides a 12:30 by 12:45 he had gone on 1/5 of the carnival rides at the rate how many hours will it take him to go on all the rides at the carnivalPLS answer i need it fast! If A and B are two Hermitian operators, showthat AB and BA may not be Hermitian, but that (AB + BA) andi(AB-BA) are both hermitian. Prove that the expectation value ofA2 is always real and non-negative. If A2=2,find the eigenvalues of A Select the correct text in the passage. which sentences in this excerpt from f. scott fitzgerald's "winter dreams" reflect dexters heartlessness? it was strange that neither when it was over nor a long time afterward did he regret that night. looking at it from the perspective of ten years, the fact that judy's flare for him endured just one month seemed of little importance. nor did it matter that by his yielding he subjected himself to a deeper agony in the end and gave serious hurt to irene scheerer and to irene's parents, who had befriended him. there was nothing sufficiently pictorial about irene's grief to stamp itself on his mind. What is common law and how is it created ? What keeps planets in our solar system?A. The elliptical motion of the planets around the sunB. The gravitational force between the Earth and SunC. The magnetic field surrounding the SunD. The electromagnetic radiation from the sun