Research has found that the body's immune system can attack your own body parts, leading to all but which of the following conditions?
a.) aids
b.) multiple sclerosis
c.) arthritis
d.) diabetes

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

How does friction with the atmosphere affect the speed of an artificial satellite

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.