« previous next »

Author Question: Which of the following must exist in a population before natural selection can a (Read 541 times)

hummingbird

  • Sr. Member
  • ****
  • Posts: 324
on: Jul 7, 2013
Which of the following must exist in a population before natural selection can act upon that population?
A) genetic variation among individuals
B) variation among individuals caused by environmental factors
C) sexual reproduction
D) Three of the responses are correct.
E) Two of the responses are correct.


Celeste

  • Hero Member
  • Posts: 588
Reply #1 on: Jun 19, 2019
A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Bartel and Szostak demonstrated chemical selection for RNA molecules that can catalyze phosphoester Bartel and Szostak demonstrated chemical selection for RNA molecules that can catalyze phosphoester
Mutation and selection diagram Mutation and selection diagram
Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ... Earth scientists have devised a scheme to divide the planet’s natural history into distinct time ...
Population: Historic Patterns Population: Historic Patterns
Human population growth, 1700 - present Human population growth, 1700 - present
Population and Community Health Nursing, 6th Edition Population and Community Health Nursing, 6th Edition
Video: Premenstrual Syndrome

For a complete list of videos, visit our video library