It has been suggested that global warming could be halted by fertilizing the oceans to increase the growth of algae. How might this affect the greenhouse effect?
A) Algal photosynthesis would use up more CO2, which traps heat.
B) Algal photosynthesis would produce more O2, which blocks light.
C) Algal photosynthesis would be inhibited by the addition of fertilizer.
D) Algae photosynthesis would use heat in place of photons.
Answer: A
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Na+ ion concentrations are higher outside the cell than inside the cell. What type of transport system is required to move Na+ ions in and out of the cell?
A. Na+ moves into the cell by facilitated diffusion and out of the cell by active transport B. Na+ moves in and out of the cell by passive diffusion C. Na+ moves in and out of the cell by active transport D. Na+ moves into the cell by active transport and out of the cell by facilitated diffusion E. Na+ moves into the cell by facilitated diffusion and can not move out of the cell
Which of the following is NOT a mechanism by which antibodies can protect the body from foreign
antigens?
a. neutralization b. agglutination c. stimulation of cytotoxic T cells d. enhancing of phagocytosis e. activation of complement
The regular pattern by which oocytes grow, mature, and are released from the ovary is known as the ________ cycle
Fill in the blank(s) with correct word
When we use the Shannon diversity index to calculate the effective number of species, we are determining how many species would provide that same diversity value:
A. if the species were similar types of organisms. B. if the populations were equally productive. C. if the individuals were evenly distributed spatially. D. if the populations were all the same size.