Sense organs ~
Sense organs are the ones that responds to external stimulus, such as heat, light, chemicals, etc
For example :
Eyes are sense organs that responds to visual stimulus like change in light intensity.
Ears are sense organs that respond to sound stimulus, like Loud music, or change in intensity of sound.
Given below are some characteristics of invertebrates.
a. Shell made of calcium carbonate
b. Jointed legs
c. Spiny body covering
d. Two-layered body (diploblastic) e.Chitinous exoskeleton
(i) Out of above what are the characteristics shown by grasshoppers?
somone please answer
By rotating their crops, farmers can significantly reduce the amount of pesticides necessary to
protect them from harmful insects. One farmer decides that using additional pesticides instead of
rotating crops would make things easier.
Select one or more:
a. sediment
b. toxic
O c. nutrient
O d. bacterial
A farmer using additional pesticides instead of rotating crops would make things more toxic for the plant and the environment
What is crop rotation?Crop rotation is a system of cropping in which different crops are planted on a particular piece of land every planting season.
Crop rotation helps to reduce the use of pesticides which are toxic to the environment.
Therefore, the farmer using additional pesticides instead of rotating crops would make things more toxic for the plant and the environment.
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the moon has a stronger influence on earths tides than the sun because the moon— a. is denser than the sun b. has more mass than the sun c. is much closer to earth d. moves much faster relative to earth
Answer: The correct answer would be C. Hope this helps!
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In eukaryotic cells, if you compared the DNA sequence of a gene with the sequence of the processedmRNA that was transcribed from the gene you would find
The DNA sequence of a gene differs from the sequence of the processed mRNA that was transcribed from the gene as it is longer and contains thymine instead of uracil.
What are processed mRNA?Processed mRNA refers to RNA they has been transcribed from a the DNA sequence of a gene.
A processed mRNA has the following differences from the DNA sequence of a gene:
It is relatively shorter It replaces thymidylate with uridylateTherefore, when comparing the DNA sequence of a gene with the sequence of the processed mRNA that was transcribed from the gene, it is longer and contains thymine in place of uracil.
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True or false? the driving force for the unloading of oxygen from hemoglobin into tissues is the difference in pco2 levels between the blood and body tissues.
Answer:
False. The driving for is the partial pressure gradient of O2 (PO2 difference), not the PCO2 gradient.
However, keep in mind that an increase in PCO2 can facilitate the unbinding of oxygen from hemoglobin. This is due to a decrease in pH associated with PCO2 increase. The H+ ions bind to hemoglobin and decrease it's affinity for oxygen, this is called the bohr effect. But the PCO2 is not the main driving force of oxygen unbinding.
Constrictions in the vocal tract will raise or lower the formant frequency. How is the first formant frequency, which is also known as F1, lowered
The formant frequency can be lowered by raising the height of the tongue
What is formant frequency?Formant frequency refers to the resonant frequencies of sound signals which are produced during speech, playing of musical instruments or when singing.
The first formant frequency is known as F1.
Movements of the vocal tract will raise or lower the formant frequency through constrictions of the vocal tract as well as movement of the tongue.
The formant frequency, which is also known as F1 can be lowered by raising the height of the tongue.
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What are the minimal components needed for a virion?.
Answer:
The minimal components needed for a virion are capsid and genome.
Explanation:
The virions consist of a nucleic acid core that constitutes the genome, along with a surrounding protein shell, which is the capsid.
Hope this helps! Have an awesome day! :D
Amaya collected insects in the forest. she was unable to identify one unusual looking insect using a dichotomous key. amaya concluded that the insect must be a new species. which facts would support the conclusion that the insect is a new species? the insect cannot be identified based on one of the first three questions. the way the insect was collected may have caused damage to its exoskeleton and wings. several other thorough and up-to-date dichotomous keys also failed to identify the insect. the normal diet of many insects in the forest has been seriously altered by a recent drought.
The dichotomous key is a tool to identify organisms based on the observable traits. As Amaya collect insect and not able to identify means several other up-to-date dichotomous keys failed to identify them.
What is dichotomous keys ?Classification helps in identification of different organisms. Dichotomous keys plays an important role in this.
It helps to identify and classify organisms on the basis of their characteristics.
It is the most common type of identification key used. When creating this key, both qualitative factors and quantitative factors are kept in mind.
As Amaya's collected insect is not identified by dichotomous key, she considered it as a new species, it can be said that several other thorough and up-to-date dichotomous keys also failed to identify the insect.
Thus, the correct option is C.
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Answer:
The dichotomous key is a tool to identify organisms based on the observable traits. As Amaya collect insect and not able to identify means several other up-to-date dichotomous keys failed to identify them.
What is dichotomous keys ?
Classification helps in identification of different organisms. Dichotomous keys plays an important role in this.
It helps to identify and classify organisms on the basis of their characteristics.
It is the most common type of identification key used. When creating this key, both qualitative factors and quantitative factors are kept in mind.
As Amaya's collected insect is not identified by dichotomous key, she considered it as a new species, it can be said that several other thorough and up-to-date dichotomous keys also failed to identify the insect.
Thus, the correct option is C.
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Explanation:
cuxz
i need help please i really don´t know
Answer:
It's B
Explanation:
I just looked up the answer.
Hope it helps.
Question 5 (1 point)
River plants have to cope with moving water. Plants, like eelgrass, have short wide
leaves so they don't get washed away.
True
False
Answer:
False
Explanation: I took the test. It is false eelgrass has long leaves.
Answer:
false
Explanation:
Nitrogen-rich compounds found in animal waste or the remains of dead plants and animals are converted to _____ by decomposer bacteria.
Nitrogen-rich compounds found in animal waste or the remains of dead plants and animals are converted to ammonium ions by decomposer bacteria.
Hope that helps!
All the offspring of a cross between a black-eyed fly and an orange-eyed fly have black eyes. This means that the allele for black eyes is _________ the allele for orange eyes.
The mechanism of stabilizing the gfr based on the tendency of smooth muscle to contract when stretched is known as __________.
Answer: Increased blood volume and increased blood pressure will increase GFR. Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR. Hydrostatic pressure in the Bowman's capsule will work to decrease GFR
Explanation:
Please help!!! I need help with this question
Answer:
The answer is C. Hope this helped you out!
Which choices describe a characteristics of a species that is likely to become invasive?
Select all that apply.
A. thrives near human developments
B. tolerates a range of environments
C. highly specialized
D. reproduces rapidly
A. thrives near human developments
B. tolerates a range of environments
D. reproduces rapidly
The choices that describe the characteristics of a species that is likely to become invasive are that it thrives near human developments and reproduces rapidly, which are in options A and D.
What is an invasive species?Human activities such as land use changes, construction, and transportation can create disturbed habitats that may be more suitable for certain non-native species. Non-native species that are able to thrive in these disturbed habitats have a higher chance of establishing themselves and becoming invasive. Rapid reproduction is a characteristic that allows a species to quickly establish a population and outcompete native species for resources. This can lead to a population explosion and the dominance of the ecosystem by the invasive species. For example, zebra mussels are a non-native species that reproduce rapidly, with each adult female producing up to one million eggs per year.
Hence, the choices that describe the characteristics of a species that is likely to become invasive are that it thrives near human developments and reproduces rapidly, which are in options A and D.
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Identity
Write "E' next to statements that describe the epidermis, "D" next to statements that describe the dermis, and
"H" next to statements that describe the hypodermis.
During a game of basketball on the playground, the glands in this layer go to work to cool your body.
The dermis is the layer of the skin where the sweat glands which work to cool your body are found.
What are sweat glands?Sweat glands are glands which produce sweat which is helps to cool the body when the body is hot.
The sweat glands are found in the middle layer of the skin known as dermis.
The other layers of skin are the epidermis found in the outermost layer and the hypodermis found in the deepest layer of the skin.
Therefore, the dermis is the layer of th skin where the sweat glands which work to cool your body are found.
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Where does fertilization occur in the female reproductive tract?.
Answer:
The Fallopian Tube
Jody notices a trend in the information in the table. the trend that she sees suggests that question 2 options: warm-blooded animals usually need to learn how to swim. animals born in water usually need to learn how to swim. warm-blooded animals usually know how to swim instinctively. animals born on land usually need to learn how to swim.
Since they lack adaptations for life in water, animals born on land usually need to learn how to swim.
Why are adaptations?Adaptations are special features and modifications in structure of an organism which helps the organism to be better suited to survive and reproduce in its environment.
All organisms have features that help them survive in their environment.
Land organisms usually have feet to walk on land.
Aquatic organisms have parts that help them swim in water.
Therefore, based on adaptations to their habitat, animals born on land usually need to learn how to swim.
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During meiosis i, maternal and paternal chromosomes come together during the process called ________ to form a ________.
Answer:
synapsis, tetrad
Explanation:
If an organism normally has 34 chromosomes, how many molecules of dna should there be in the g1 phase of the cell cycle?.
Answer:
12 DNA molecules in G1.
Explanation:
Why is it that mutations to
body cells do not affect offspring?
Answer:
Since all cells in our body contain DNA
Explanation:
Since all cells in our body contain DNA, there are lots of places for mutations to occur; however, some mutations cannot be passed on to offspring and do not matter for evolution. Somatic mutations occur in non-reproductive cells and won’t be passed onto offspring. Its seeds will not carry the mutation. Somatic cells give rise to all non-germline tissues. Mutations in somatic cells are called somatic mutations. Because they do not occur in cells that give rise to gametes, the mutation is not passed along to the next generation by s means.
(a) Identify both the cellular component and the location of the component that is responsible for producing the luciferase protein from mRNAs transcribed in the plasmid-containing T lymphocytes. Explain what dictates to the lymphocytes the correct order in which amino acids should be linked to form the luciferase protein.
(b) Identify the independent variable in the experiment described. Identify the plasmid that was used as a negative control for luciferase activity. Justify including the plasmid with the non-CD3γ active promoter in the experiments.
(c) Identify the plasmid that must contain the CD3γ core promoter sequence but the fewest or no negative regulatory sequences. Based on the data in Figure 2, describe the most likely cause of the variation in luciferase activity among the cells that contain plasmids pCD3γ-419, pCD3γ-309, pCD3γ-239, and pCD3γ-199. Calculate the approximate percent increase in luciferase activity between cells containing plasmid pCD3γ-59 and cells containing plasmid pCD3γ-149. Round to the nearest whole number.
(d) Predict the most likely observed level of luciferase activity if plasmid pCDγ3-789 is introduced into nonlymphoid cells such as a line of kidney tissue cells. Provide reasoning to justify your prediction.
Ribosomes are the organelles that is resposnible for the production of luciferase.
Where luciferase is produced?Luciferase is produced by ribosomes in the cytoplasm of the cell or in the cytosol of the lymphocytes. This indicates the sequence of nucleotides in the messager RNA gives message to the amino acid sequence of luciferase.
So we can conclude that ribosomes are the organelles that is resposnible for the production of luciferase.
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Brownfields are best described as _______. a. parcels of polluted land that cannot be redeveloped safely b. polluted land that must be remediated before being redeveloped c. land where pollution has killed all vegetation, turning it "brown" d. fields with excess organic waste and animal feces please select the best answer from the choices provided a b c d
Brownfields are best described as ; ( B ) Polluted land that must be remediated before being redeveloped.
What is a brownfiledA brown field is an underused or abandoned piece of land ( usually indutrial ) which is suspected or actually contaminated with chemicals or other forms of environmental contamination. An example of a brownfiled is an abandoned gas station and a metal plating facility. For a brownfield to be redeveloped the land must be remediated.
Hence we can conclude that Brownfields are best described as ; ( B ) Polluted land that must be remediated before being redeveloped.
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What changes must humans make to protect the environment
Answer:
According to climate experts, it is urgent to fight the growth of the greenhouse effect, which, by contributing to the excessive warming of the planet, threatens its ecological balance. From the reduction of fossil fuel consumption to the geological storage of CO2, many solutions are envisaged to preserve a balance threatened by increasing industrialization and the development of transport.
Reducing CO2 emissions requires simultaneous action on several fronts: controlling energy demand, improving energy efficiency during production and conversion of fossil fuels, replacing fossil fuels with energy containing less or carbon and the establishment of a market for tradable CO2 emissions permits.
A new way to fight greenhouse gases is the capture of these gases from its source of production and its storage in the underground, appears as a promising solution to face the risk of climate change. Major scientific breakthroughs are expected in this area.
Explanation:
Which of the following is an example of a favorable mutation
A) A mutation that gives a lizard an extra leg
B) A mutation that causes a bird's eye color to change
C) A mutation that causes a snow rabbit to have black fur
D) A mutation that causes a flower be more brightly colored
Answer:
D
Explanation:
insects are more attracted to brighter colored flowers
In seed-bearing plants, what structure becomes the seed following fertilization?.
The ovule becomes the seed.
Important applications of polymerase chain reaction (PCR) include the following with the general exception of: ________
Answer:
The answer would be search for mutations with large deletions.
Explanation:
The reason why is becasuse what Polymerase Chain Reaction (PCR) does is amplify specific regions of DNA. PCR often is used to test for viruses like SARS-CoV-2 along with other infectious diseases.
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You determine that a victim is unresponsive but breathing. While waiting with the victim for EMS personnel, you would position the victim:_______.
Answer:
You would put the victim in the recovery position
Explanation:
The recovery position is a position in which the victim is laying on their side.
You determine that a victim is unresponsive but breathing. While waiting with the victim for EMS personnel, you would position the victim in the recovery position.
They benefit from having their head in this posture with their airway open. Their tongue will slip forward, allowing blood and vomit to pour out. It is referred to as the "recovery position" at times.
The recovery posture will keep someone's airway open and clean. It also makes sure that they won't choke on any liquids or vomit.
The recovery posture will keep someone's airway open and clean. It also makes sure that they won't choke on any liquids or vomit.
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In what order do the changes in the succession of an ecosystem occur?
An example of succession is a landslide is produced, then lichens grow, this leads to the accumulation of thin soil, which finally leads to a mature community.
What is succession?Succession is an ecological process associated with the renewal of the ecosystem after a disturbance.
The process of succession is fundamental for reaching the homeostasis (internal equilibrium) of the ecosystem.
The succession may involve the emergence of new species in the ecosystem after disturbance.
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What elements are needed to carry out photosynthesis? Select all that apply.
water
solar energy
oxygen
carbon dioxide
glucose
carbohydrates
Answer:
Water, Solar energy, and Carbon Dioxide.
Explanation:
The overalll reaction of photosynthesis is 6CO2 + 6 H2O -> C6H12O6 (Glucose) + 6O2. This reaction is driven by energy in the form of electromagnetic radiation (light).
As we can see we need CO2, H2O, and light as reactants. And oxygen + glucose (carbohydrates) are our products.