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Luden [163]
3 years ago
8

( NEED HEALP ASAP 21pts )

Biology
2 answers:
cluponka [151]3 years ago
7 0
Low levels of serotonin
Elodia [21]3 years ago
3 0

B.

low levels of serotonin

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In which population was natural selection not the reason for the difference in fitness?
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Although the operation of natural selection requires that genotypes differ in fitness, for some geneticists it seems easier to understand natural selection than fitness. Partly this reflects the fact that the word “fitness” has been used to mean subtly different things. Here I distinguish among these meanings (e.g., individual versus absolute versus relative fitness) and explain how evolutionary geneticists use fitness to predict changes in the genetic composition
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A scientist hypothesizes that increasing the amount of salt in a body of water will decrease the number of plants that can live
Harlamova29_29 [7]

Dependent and Independent variables are regarded as variables in mathematical and statistical modeling and of course in some other aspects.

The independent variable is this case is the amount of salt.

  • In this kind of scenario, one can think of independent and dependent variables in terms of cause and effect.  
  • An independent variable is the variable we assume to be the cause, while a dependent variable is assumed as the effect.
  • Therefore, with this case, the amount of salt would cause a decrease in the number of plants.
  • While the effect of increasing the amount of salt would be seen in the number of plants.

Learn more about dependent and independent variable: brainly.com/question/25223322

3 0
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A man has A blood (genotype BB) is married to a type B person ( genotype BO) what proportion of their children will have
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How can accidental transfer of DNA impact a crime scene investigation? In addition, explain why accidental DNA transfer cannot b
xeze [42]

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orensically valuable DNA can be found on evidence that is decades old. However, several factors can affect the DNA left at a crime scene, including environmental factors (e.g., heat, sunlight, moisture, bacteria, and mold). Therefore, not all DNA evidence will result in a usable DNA profile.

Explanation:

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