Which of the following statements regarding lichens is FALSE?
A) Lichens are a mutualistic relationship between a fungus and a protozoan.
B) Lichens represent a mutualistic relationship between a fungus and an alga.
C) Lichens are often the first life form to colonize rock or soil.
D) The algal partner produces carbohydrates that are absorbed by the fungal partner.
E) The fungal partner provides a means of attachment and protects the algal partner from desiccation.
A
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Which of the following is competition between members of the same species for resources?
a. interspecific competition b. dynamic competition c. intraspecific competition d. shared governance
The mixta gene in snapdragons helps determine flower color by regulating
a. anthocyanin production. b. production of pigments other than anthocyanin. c. cell shape. d. production of anthocyanin and other pigments. e. anthocyanin production and cell shape.
Accommodation involves the ability to
a. change the sensitivity of the rods and cones by means of neurotransmitters. b. change the curvature of the cornea. c. change the width of the lens by contracting or relaxing certain muscles. d. adapt to large changes in light intensity. e. see variations in color.
For a lambda phage in lysogeny, why is a repressor protein required to block the lytic cycle from the beginning?
What will be an ideal response?