Homologous structures were "discovered" by findings that indicated that ____
a. species on different continents were not similar in form
b. different geological layers held different kinds of fossils
c. structures of similar form and position occurred in animals of markedly different size, shape, and lifestyle
d. some structures found in animals are apparently useless
e. some kinds of animals had apparently gone extinct
C
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Ehrlich and Raven proposed an "escape and radiate" hypothesis that predicts that:
A. plants that escape their herbivores will radiate, increasing diversity. B. plants that are not eaten will develop more similar traits. C. plants and insects co-evolve toward less species diversity. D. plants will only win the evolutionary "arms race" if they escape to new habitats. E. plants and insects are showing less diversity through time as each adapts to the other's defenses.
A stretch receptor is classified as a
a. chemoreceptor. b. mechanoreceptor. c. photoreceptor. d. thermoreceptor. e. all of these.
Select the best response to the question. ?
The environmental services worker who mops a patient's room after discharge is doing what type of microorganism removal?? A) disinfection B) decontamination C) sterilization D) cleaning
A polar body
A) is a structure found at one pole of a mature egg. B) can be fertilized by a sperm. C) nourishes the egg until it is fertilized. D) is formed at the same time as a primary oocyte. E) is a discarded set of chromosomes.