Which is not an emotional reaction to stress?
picking a fight
feeling moody or aggressive
noticing your heart racing
bursting into tears more often
Genetic variation<span> is essential for </span>natural selection<span> because </span>natural selection can only increase or decrease frequency of alleles that already exist in the population.Genetic variation<span> is caused by: mutation
i pulled this off of the site i got the information from i hope this helps you out if not sorry
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I believe a valley or mountain, but I am not 100 percent sure.
Answer:
Phototrophs
Explanation: Some organisms obtain their energy from the sun by the process of photosynthesis. These organisms are known as phototrophs because they can make their own organic molecules using sunlight as a source of energy.
Answer is option C tertiary structure ....hydrogen bonds