Mycorrhizal association with plant roots is best described as
A. a symbiotic relationship between the plant and certain bacteria.
B. detrimental to the roots.
C. a fungus root interrelationship.
D. a kind of fungal parasite on plant roots.
E. only a temporary association dependent on water uptake.
Answer: C
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Observable traits are known in genetics as ____
a. phenotypes b. genotypes c. homozygous d. heterozygous e. homozygous genotypes
Which type of skeleton is found in a starfish?
a. cartilaginous
b. exoskeleton c. hydrostatic d. chitinous e. endoskeletal
A simple reflex consists of the effects of a stimulus on a ______that causes transmission of a message through parts of the _____ system and leads to an _____ response by an effector.
Fill in the blank(s) with the appropriate word(s).
An endotherm is an animal that
a) regulates its body temperature by living underground b) does not regulate its body temperature c) regulates its body temperature by staying in the sun d) regulates its body temperature partly by generating its own body heat