« previous next »

Author Question: Which of the following must exist in a population before natural selection can a (Read 616 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?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater, Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
Natural capital degradation Natural capital degradation
Alexander Fleming photographed in his lab where he observed the natural competition between a fungus Alexander Fleming photographed in his lab where he observed the natural competition between a fungus
Rural versus Urban Population, 1820–1860 Rural versus Urban Population, 1820–1860
Population growth Population growth
HIV in population worldwide HIV in population worldwide
Video: Introduction to filtration - filtrate formation and composition

For a complete list of videos, visit our video library