Plants as well as brown, green, and red algae show a basic life cycle that involves the alternation of generations between a(n)

A. spore and pollen.
B. egg and a sperm.
C. seed and a cone.
D. megaspore and a microspore.
E. sporophyte and a gametophyte.


Answer: E

Biology & Microbiology

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A single oak tree can support hundreds of beetles, caterpillars and other primary consumers. Such a phenomenon is an example of

A. a pyramid of biomass. B. excessive levels of primary production. C. an unusually diverse group of primary consumers. D. primary parasitism. E. an inverted pyramid of numbers.

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Horozontal rows of parenchymal cells that tranport materials horizontally are called?  

A.  rays B.  tracheids C.  vessel elements D.  fibers E.  sieve tubes

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List some of the environmental factors that are potentially associated with male and female infertility?

What will be an ideal response?

Biology & Microbiology

The term that describes the diffusion of water is:

A) simple diffusion. B) osmosis. C) equilibrium. D) facilitated diffusion. E) active transport.

Biology & Microbiology