In which animal is a countercurrent flow system used to acquire oxygen?
A. fish
B. whales
C. mammals
D. lizards
E. birds
Answer: A
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the normal function of a human kidney? What will be an ideal response?
When plants are grown in hydroponic culture, their roots are suspended in an aerated solution. Why is the solution aerated? Check all that apply.
A. Without oxygen, the xylem would stop flowing. B. Both the light-dependent and the light-independent reactions of photosynthesis require oxygen. C. Oxygen is necessary for the root cells to produce ATP. D. Without oxygen, membrane transport in the roots would be impaired. E. A lack of oxygen would cause the water potential within the roots to decrease.
The use of chemical agents to harm or kill microbes is
A. immunology. B. chemotherapy. C. epidemiology. D. serology. E. biotechnology.
In some organisms, the primary function of a gene in a cell is to participate in regulating the body as a whole rather than responding to the cell's immediate environment. These organisms would be
A. diploid. B. multicellular. C. prokaryotic. D. bacterial.