Natural selection does not

A. make species stronger over time

B. select what a species needs

C. cause changes in a population

D. increase how often favorable traits are passed on

Importance of cell membrene

Which term best describes an animal that, although generating a significant amount of heat through metabolism, nonetheless does not maintain a constant body temperature

What is the role of specialized cells in the body? Choose the correct answer. Specialized cells perform specific functions for the body, enabling the organism to survive. Specialized cells create stem cells for differentiation.

Bell and collaborators painstakingly documented a population of fossil sticklebacks from an ancient freshwater lake over a 20,000-year period. The prevalence of sticklebacks with full and reduced pelvises changed over time. Which is true? a.

For most people, the more vigorous and longer lasting the exercise, the greater the health benefits. a. True b. False

Which group of microorganisms is most likely to spoil a freshwater trout preserved with salt? A) Psychrophiles B) Facultative halophiles C) Anaerobes D) Thermophiles E) Hyperthermophiles

What is unique about dogs?

3. The best thing you can do to keep a positive relationship with your supervisor is to

What contains both communities and ecosystems?

Which of the following represents a way that animals in a zoo are influenced by their environment? a. increased natural instincts b. decreased aggression c. unnatural behavior d. increased appetite