In plants, the haploid, single-celled product of mitosis is a

A) sporophyte.
B) gametophyte.
C) zygote.
D) spore.
E) gamete.


E

Biology & Microbiology

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The class of proteobacteria that may be incorporated into the gamma proteobacteria is the ________.

A. delta proteobacteria B. alpha proteobacteria C. beta proteobacteria D. epsilon proteobacteria

Biology & Microbiology

What are the three lines of evidence that challenge fundamental aspects of many set-point theories of body-weight regulation?

What will be an ideal response?

Biology & Microbiology

Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?

A) artificial selection B) directional selection C) stabilizing selection D) disruptive selection E) sexual selection

Biology & Microbiology

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called

A. active transport. B. diffusion. C. facilitated diffusion. D. endocytosis. E. osmosis.

Biology & Microbiology