Mycorrhizae, specialized symbiotic associations between the roots of plants and fungi, are characteristic of

A. about 90% of all plants.
B. all plants.
C. about 40% of all plants.
D. about 60% of all plants.
E. about 20% of all plants.


Answer: A

Biology & Microbiology

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Neurons that carry messages from sensory receptors to the CNS are

(a) sensory. (b) motor. (c) interneurons. (d) both a and b.

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Which statement represents the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology? Dogs and wolves _____

A) have very similar morphologies B) belong to the same order C) are both members of the order Carnivora D) share a very recent common ancestor

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This process of horizontal gene transfer involves cell-to-cell contact.

a) HFr conjugation b) Generalized transduction c) Transformation d) Spontaneous genetic mutations

Biology & Microbiology

3. You may expect to always see the same doctor if you choose _____

a private practice a hospital large health centers all of the above none of the above

Biology & Microbiology