Archibald Garrod was the first to advance the idea that there is a direct link between ____________________ and
__________________ Fill in the blank(s) with the appropriate word(s).
genes; proteins
proteins; ge
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Most of the energy within an ecosystem is lost:
a. when organisms disperse b. when organisms die c. as a result of metabolism d. by organisms at the top of the food web e. by decomposers
The usual, naturally-occurring mechanism that prevents development of cancer is the action of ____
a. cytotoxic T cells b. oncogenes c. radiation d. chemotherapy e. carcinogens
Over the course of evolutionary time, animal body sizes have gotten larger, yet cell sizes have not. Cells have stayed proportionally the same size to remain efficient, because
A) if cells got larger, the demand for energy and raw materials would greatly decrease. B) larger cells would become limited by the ability to move materials across the plasma membrane. C) of limitations of the composition of the plasma membrane. D) of the inability of the nucleus to produce sufficient DNA for larger cells. E) the Golgi apparatus would not be able to meet the demands of cell transport of larger cells.
The male gametophyte generation of angiosperms is represented by:
A) the style. B) seeds. C) embryo sacs. D) pollen grains.