The wings of birds and the wings of bats represent
a. homologous structures.
b. analogous structures.
c. homoplastic structures.
d. vestigial structures.
e. structures that are homoplastic but with homologous components.
E
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Plants can have ___________ defenses, which are always active, or _________ defenses, which are produced only when a plant is threatened
A. inducible; constitutive B. constitutive; inducible C. chemical; mechanical D. mutualistic; symbiotic
Habitats in which resources are limited favor ________ species that allocate resources to maintenance
Fill in the blank(s) with correct word
Plants connected by mycorrhizal fungi:a
must be of the same species. b. can only exchange carbon dioxide in one direction. c. are an excellent example of a parasitic relationship. d. compete for light. e. exchange organic materials in both directions.
Synapsis is the
A. exchange of genetic material between homologous chromosomes. B. condition in which homologous chromosomes pair and lie close to each other. C. independent assortment of homologous chromosomes. D. separation and movement of homologous chromosomes to the poles.