« previous next »

Author Question: In the evolution of whelk-eating behavior in crows, which of the following was o (Read 332 times)

strangeaffliction

  • Hero Member
  • *****
  • Posts: 660
on: Oct 26, 2013
In the evolution of whelk-eating behavior in crows, which of the following was optimized through natural selection?
A) the average number of drops required to break the shell
B) the average height a bird flew to drop a shell
C) the average total energy used to break shells
D) the average size of the shells dropped by the birds
E) the average thickness of the shells dropped by the birds


Celeste

  • Hero Member
  • Posts: 588
Reply #1 on: May 30, 2019
C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Evolution of Primate Species Evolution of Primate Species
Effect of Inactivation of the Insula on Reinstatement of Drug-Seeking Behavior in Rats Effect of Inactivation of the Insula on Reinstatement of Drug-Seeking Behavior in Rats
Caudate Nucleus and Stereotyped Behavior in Autism Caudate Nucleus and Stereotyped Behavior in Autism
Evolution of Treatment for Mental Disorders Evolution of Treatment for Mental Disorders
Human evolution Human evolution
Video: How do the different types of chromatography work? (No Audio)

For a complete list of videos, visit our video library