Meiosis and unequal cytoplasmic division in seed plant ___ produce three small cells that disintegrate and one large
megaspore.
a. pollen sacs
b. pollen grains
c. gametophytes
d. microspores
e. ovules
ANSWER: e
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How do plants benefit from a mycorrhizal partnership with a soil fungus?
a. the fungus provides sugars b. the fungus participates in photosynthesis c. they provide digestive enzymes d. they increase the absorptive surface area of the plant and provide water and nutrients e. the protect the plant from pathogens
A ___________is made of epithelial tissue and is used to secrete substances into ducts and into the bloodstream.
A. fibroblast B. gland C. adipocyte D. muscle cell E. neuroglia
Cows and other ruminates rely on a ____ relationship with bacteria in their digestive tract
a. parasitic b. mutualistic c. commercialistic d. commensalistic e. chemosynthetic
The gene of an operon that codes for a protein repressor is called the
A. structural locus. B. operator. C. regulator. D. promoter.