Answer:
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<span>i think this could help When the surface of the soil is frozen, most plants die because they cannot get water and nutrients from the soil because of their *structures* hint are too short to get past the frozen layer. What plant structure brings nutrients and water to the plant from the soil? </span>
The environment is the ultimate filter for which traits are maintained by natural selection. If a trait makes it easier to live in an environment, then that trait will be maintained. If a trait is makes it difficult to live in an environment, then that trait will be discontinued or removed.
Answer: B
Explanation: Traits usually die off when they are unneeded by the organism, or if the trait causes harm to the organism's survival. Through natural selection, over time, the organisms with the best combination of traits for its survival will become the dominating species, and those with weaker traits may not survive long enough to pass off their traits to future offspring.
Answer:
Time taken by the nerve signal for travelling this distance 
seconds
Explanation:
Given,
The length of nerve cell connecting the spinal cord to the feet 
Speed of nerve impulse 
Time taken for the nerve signal to travel this distance is equal to the total " length of nerve cell connecting the spinal cord to the feet" divided by "speed of nerve impulse"
Substituting the given values in above equation, we get -
seconds.
Thus , time taken by the nerve signal for travelling this distance seconds
