Changes in the human species since the time of the first humans is an example of
A. evolution.
B. hydrolysis.
C. life.
D. metabolism.
A. evolution.
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In males, the primary source of estrogens is the ________
A) hypothalamus B) heart C) adrenal cortex D) ovaries
Ancestors of ____ may have possessed mitochondria, which were lost or reduced during evolutionary history
a. Paramecium b. Laminaria
c. Amoeba d. Euglena e. Giardia
Four of the five statements below apply to the phosphorus cycle. Which one does not apply?
a. Phosphorus cycles from land to water and back again. b. Phosphorus does not exist in a gaseous state. c. Dissolved phosphorus enters aquatic ecosystems from the atmosphere. d. Phosphorus will probably be depleted during the 21st century. e. Erosion from clear-cutting and agriculture accelerate phosphorus loss.
Which of the following has/have developed antibiotic resistance?
A. gonorrhea B. enterococci C. malaria D. tuberculosis E. All of these diseases and organisms have developed drug resistance.