Motility improved the fitness of these early cells because:

a. It allowed them to make a nuclear envelope.
b. It caused them to acquire ribosomes.
c. It allowed them to move away from predators and towards food.
d. Two of the above.
e. None of the above.


Answer: c. It allowed them to move away from predators and towards food.

Biology & Microbiology

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Tinbergen's wasp experiments demonstrated that wasps find their nests by ____ cues

a. olfactory b. auditory c. visual d. both olfactory and visual e. both magnetic and auditory

Biology & Microbiology

In angiosperms, meiosis of cells in the ovule give rise to haploid megaspores. What happens next?

a. Mitosis gives rise to a seed. b. Mitosis gives rise to an egg, a cell with two nuclei. c. Mitosis gives rise to a sporophyte. d. Meiosis gives rise to a dipold egg and a cell with two nuclei. e. Meiosis gives rise to a more megaspores.

Biology & Microbiology

An organ must contain at least:

A. two different tissue types. B. connective tissue. C. all four of the tissue types. D. two different muscle types. E. two different cell types.

Biology & Microbiology

In the Breathalyzer, ethyl alcohol reacts with ___ ___; this reaction is accompanied by a color change.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology