Which element is the basis for the macromolecules found in living things?

A) carbon
B) hydrogen
C) nitrogen
D) oxygen


A

Biology & Microbiology

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What do all deuterostomes have in common?

A) Adults are bilaterally symmetrical. B) Embryos have pharyngeal pouches that may or may not form gill slits. C) All have a spinal column. D) All have specialized head and tail regions. E) The pore (blastopore) formed during gastrulation becomes the anus.

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A type of fungus that produces toxic alkaloids is

a. Aspergillus. b. the death cap mushroom. c. ergot. d. the Psilocybe mushroom

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The morphological species concept:

A) is not applicable to all forms of life, past and present B) defines species by observable and measurable physical traits C) is based on the idea of reproductive isolation D) requires that an organisms DNA be analyzed E) all of the above

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Organisms in the deep sea must tolerate

a. low temperatures and high nutrient levels. b. low temperatures and moderate nutrient levels. c. moderate temperatures and low nutrient levels. d. low temperatures and low nutrient levels.

Biology & Microbiology