A K-selected species will exhibit which of the following characteristics?
A. wildly fluctuating population size
B. generalized niche
C. early reproductive age
D. low population growth rate

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.

When the body has a weakened immune system, the production of antibodies is increased.

Which elements are in the substance that makes up about 60% of the male human body