What is the half life of a radioactive isotope if a 500 gram sample decays to 62.5 grams in 99 years?
Answer:
24.75 years
Explanation:
62.5 is 1/4 of 500, which means that in 99 years it passed through four half-lifes. So, you divide 99 by four and you get that the half-life is 24.75 years. 25 years if it was rounded
What determines the type of feedback? A. How close to equilibrium the characteristic is B. How the body responds to a change C. How much product is present already
Answer:
The awnser is B
Explanation: no explanation
The fact that determines the type of feedback is "How the body responds to a change?" Thus, option B is correct.
What is positive feedback?A feedback has been known as the process where a system responds to an external or internal stimulus. There are two major types of feedback in a system, they are negative and positive feedback or we can say that there are two types of feedback is there one is positive feedback and another one is negative feedback.
Positive feedback is a type of response that occur when an output or response is an enhancement of the input. It's output moves further away from equilibrium. A negative feedback occur when a fraction of the output is fed back to the system to control fluctuation of other output.A feedback has been known as the process where a system responds to an external or internal stimulus.
Therefore, The fact that determines the type of feedback is "How the body responds to a change?" Thus, option B is correct.
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An upper motor neuron supplying the lateral rectus muscle of the eye would be part of the ________ tract(s)
Answer:
corticospinal tract
The neurons that travel in the corticospinal tract are referred to as upper motor neurons; they synapse on neurons in the spinal cord called lower motor ...
In humans, which of these is required for carrying oxygen from the lungs to body cells?.
The primary function of cellular respiration is to ________. A) determine the amount of heat needed by the human body B) provide the body with adequate amounts of vitamins and minerals C) efficiently monitor the energy needs of the body D) break down food molecules and generate ATP
The primary function of cellular respiration is to break down food molecules and generate ATP.
What is cellular respiration?Cellular respiration is the process by which living organisms obtain energy in form of ATP by breaking down food molecules in their cells.
Cellular respiration occurs in all living organisms because energy is required for their daily metabolic activities.
Therefore, the primary function of cellular respiration is to break down food molecules and generate ATP.
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What is the correct sentence?
Genes code for proteins, and proteins code for traits.
Proteins code for genes, which code for traits.
Traits code for genes, and genes code for proteins.
Answer: The correct sequence in the expression of a trait is gene > protein > trait (Option B).
Explanation:
During gene transcription, a linear fragment of DNA referred to as a 'gene' is used as template to synthesize a complementary messenger RNA (mRNA) sequence.
Subsequently, this mRNA is then used as template to create a protein by a process called translation.
Moreover, phenotypic traits can be defined as all observable characteristics that an organism has.
The phenotypic traits are largely determined by the expression of either enzymatic or structural proteins, which interact to shape the phenotype of an organism.
In conclusion, the correct sequence in the expression of a trait is gene > protein > trait (Option B).
Answer:
Genes code for proteins, and proteins code for traits.
Explanation:
Simplified Response:
Genes direct the synthesis of RNA through transcription and translation. Through these processes, proteins are assembled. These proteins form the structures and functions that make up all living organisms. And therefore, these proteins are responsible for the traits of living organisms as well.
So, that's why the correct choice would be the first option.
Genes --> Proteins --> Traits
Killer whales
Sea lions
Salmon
Baleen whales
Herring
Zooplankton
Phytoplankton
Which of the following are missing from the food web shown above?
F Producers
G Decomposers
H Omnivores
Predators
Answer: Decomposers
Explanation:
Which statement describes nuclear fission?
o the joining of two nuclei
o the use of neutrons to make energy
O the splitting of a nucleus
o the production of electricity from atoms
According to the the concept of nuclear reactions ,nuclear fission is the splitting of the nucleus.
What are nuclear reactions?
There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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The heavily myelinated fibers that connect the two cerebral hemispheres are collectively called the:
Answer: corpus callosum
Explanation: The corpus callosum is a collection of nerve fibers that connect the two hemispheres.
No fake answers and no links. Why do astronomers rely on different types of telescopes?
Answer:
Because different telescopes are used to study and observe different types of objects in space.
Explanation:
They need many different types of telescopes to look at space because each telescope shows them different things. Light comes in wavelengths from short to long. Even though all light is fundamentally the same thing, the way that astronomers observe light depends on the portion of the spectrum they wish to study. And it also depends on the telescope itself.
During a Vo2max test, many people have a Respiratory Exchange Ratio greater than 1.0 as they approach their VO2max. Why
The important of RER between 0.7 and 1 shows a blend of carbohydrates and fat as a basis of energy. In case the value is more significant than 1, it means anaerobic respiration as a result of more carbon dioxide being developed than the oxygen that is being consumed.
What is the difference between vo2max and relative vo2max?Absolute VO2 max is only the amount of oxygen you breathe in liters per minute.
This dose depends on your age, weight, size, and gender. Relative VO2 maximum Relative VO2 max calculates your weight in liters per minute per kilogram of body weight.
Thus, anaerobic respiration results of more carbon dioxide being forged than the oxygen that is being destroyed.
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Increasing levels of greenhouse gases have caused a:.
What does the sea otter do for the kelp forest?
O They control the urchin population by eating the urchins.
They control the sea slug population by eating plastic.
O They control the clownfish population by eating the kelp.
They control the kelp population by eating sea slugs.
Answer:
They eat large amounts of sea urchins, which keeps the creature's numbers in check and prevents the destruction of the kelp forest.
Explanation:
Answer: Sea otters have long been recognized as a classic example of a keystone species, a dominant predator that maintains the balance of kelp forest ecosystems by controlling populations of sea urchins, which are voracious kelp grazers.
100 POINTS 100 POINTS Has anyone ever done this worksheet or know what to do? please send me answers. if you dont know dont respond. if you know only a few answers, then you can answer
6) In the illustration, choose the letter of the diagram that best represents anaphase. Α) В) C) D)
Answer:
Illustration D shows the phase of anaphase
The smaller cell produced by oogenesis meiosis i, called the first polar body, is essentially a packet of discarded nuclear material.
The statement "The smaller cell produced by oogenesis meiosis is called the first polar body, is essentially a packet of discarded nuclear material.". is a true statement. This is further explained below.
What is oogenesis?Generally, Oogenesis is a process that takes place in the ovary's outermost layer, where the initial meiotic division commences in a primary oocyte.
In conclusion, oogenesis meiosis is essentially a packet of discarded nuclear material.
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Marnee goes to the doctor because she has been coughing and sneezing. The doctor explains that a pathogen entered her cells and started replicating, which caused her to get sick. What was the cause of Marnee’s sickness?
A) bacteria
B) fungi
C) protists
D) virus
When biotic potential is completely
balanced with environmental resistance,
the population.
A. increases
B. decreases
C. stabilizes
Answer:
Stabalizes
Explanation:
Because it is a balanced environment.
Answer:
When biotic potential is completely
balanced with environmental resistance,
the population.
A. Increases
B. Decreases
C. StabilizesExplanation:
Because, biotic potential is completely balanced with environmental resistance, which make the population stabilizes.
Enzyme complexes that break down protein are called _____. lipases ubiquitins amylase proteasomes nucleases
Proteasomes are a large protein complex present in all eukaryotic cells that break down protein.
What are proteasomes?It is considered one of the main pathways involved in the processes of enzymatic protein degradation.
It is the group of proteins that are associated forming large complexes, whose function is to digest cytoplasmic proteins, generating peptides.
Therefore, we can conclude that proteasomes is a large protein complex present in all eukaryotic cells that breaks down protein .
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HELP PLSS!!
In your own words, explain how recombinant DNA techniques are used to produce medications.
Explanation:
Recombinant DNA technology enables us to change the physiology of a cell. Through this, we can produce many humanoid enzymes in other organisms... For example insulin.
Transfusing mismatched blood types is a problem for a patient because A. it slows down digestion. B. it changes blood composition. C. it causes infection. D. it causes clots in blood vessels.
Answer:
D. it causes clots in blood vessels.
Explanation:
If you receive blood that is not compatible with your blood, your body produces antibodies to destroy the donor's blood cells. This process causes the transfusion reaction. Blood that you receive in a transfusion must be compatible with your own blood.
To determine the density of a rabbit population, one would need to know the number of rabbits and __________.
To determine the density of a rabbit population, one would need to know the number of rabbits and the size of the area in which they live.
What is a scatter pattern? What can it tell a forensic anthropologist?
Answer:
A scatter plot (aka scatter chart, scatter graph) uses dots to represent values for two different numeric variables. The position of each dot on the horizontal and vertical axis indicates values for an individual data point. Scatter plots are used to observe relationships between variables.
A scattered pattern is an area where the bones are distributed after a while. This can tell anthropologist how long the body was in the area and the conditions scene the bones arrived.
Explanation:
Answer:
A scattered pattern is an area where the bones are distributed after a while. This can tell anthropologist how long the body was in the area and the conditions scene the bones arrived.
2.In the model below what is most likely the reason for placing the farmland upstream from the factories?
Answer:
It is easier to send the raw materials to the factories to become finished goods.
Explanation:
I don't know if this was multiple choice, but you would put the farmland upstream from the factories so that the crops and other raw materials could easily go down to the factories to be finished. I hope this helped :)
which classification groups have linear chromosomeswhich classification groups have linear chromosomes
Until recently, prokaryotes did not contain linear plasmids or chromosomes, but they have since been discovered in spirochaetes, Gram-positive bacteria, and Gram-negative bacteria. Bacterial linear DNA has been classified into two structural kinds. Each end of linear plasmids from the spirochaete Borrelia has a covalently closed hairpin loop, while each end of linear plasmids from the Gram-positive filamentous Streptomyces has a covalently connected protein. In eukaryotic cells, replicons with comparable structures are more common than in prokaryotes. However, linear genomic architectures are likely more widespread in bacteria than previously thought, and some replicons may be able to switch between circular and linear isomers. The molecular biology of these widely scattered pieces reveals information about the origins of linear DNA in bacteria, including evidence of prokaryote-eukaryotes genetic exchange.
6. How did natural selection work in the red-eye frog egg hatching?
7. What was the explanation regarding the phenotypic plasticity of the red-eye frog eggs?
We can confirm that natural selection resulted in the coloration of the red-eye frog due to its higher chance of survival with this change in pigment.
Why would this color help the frog survive?Bright pigments are a common defense mechanism in nature. Organisms that are poisonous often evolve bright coloration as a warning to predators. Over time, natural selection ensures that the organisms who've successfully incorporated this pigmentation have much higher survival rates and therefore the species entirely evolves into possessing this trait, as was the case with the red-eye frog.
Therefore, we can confirm that natural selection resulted in the bright pigmentation of the red-eye frog because of the much higher survival rate that this adaptation afforded the organism.
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What is the process by which arteries become hard and stiff as a result of too much pressure?.
Answer: atherosclerosis
Explanation:
Who discovered tetrapod fossils in Greenland
Answer:
It was discovered by Jennifer Clack
Which phrase describes air pressure?
Answer:
psi, or pounds square inch
(HERE IS THE ANSWER)
Which of the following are effectors in this reflex
arc? Check all that apply
* nerve ending in nasal passage
nose
Like other reflexes, sneezing involves a reflex arc,
Sneezing is triggered when the nerve endings in
the nasal passage are irritated by something like
dust or an unusual smell. Nerves carry these
impulses to the sneezing center in the brain stem
The sneezing center sends instructions to the
facial nerves that lead to the lungs and
diaphragm. The eyes water, the nasal passages
secrete fluid, and the diaphragm moves abruptly,
causing a deep breath. Then, a contraction in the
chest muscles cause air to quickly leave the nose
and mouth
X brain stem
lungs
diaphragm
eyes
Answer:
In this reflex arc, the
✔ nerve endings in nasal passage
is/are the receptor(s).
In this reflex arc, the
✔ sneezing center in brain stem
is the interneuron
Explanation:
e2020
Answer:
nose
lungs
diaphragm
eyes
Explanation: