Polar bodies are unique products of ________
A) cytokinesis
B) oogenesis
C) mitosis
D) spermatogenesis
B
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Because most herbivores do not produce cellulase, they have specialized compartments in their digestive tracts that (select all correct choices):
A. provide appropriate temperature and pH for breaking down plant material. B. house large populations of bacteria and other single-celled symbionts that do produce cellulase. C. grind up the plant material using muscular gizzards or other structures. D. secrete alternative enzymes that carry out the same function as cellulase. E. ferment nutrients in the hindgut.
Endocrine glands and neurons receive signals from the ____
a. amygdala b. hypothalamus c. adrenal cortex d. anterior pituitary gland e. thyroid
The first autotrophs probably were _____ and produced _______.
A. photosynthetic, oxygen. B. photosynthetic, no oxygen. C. eukaryotic, oxygen. D. eukaryotic, no oxygen.
In some species, sex determination is influenced by environmental temperature during development. If you wanted to determine the temperature at which one would obtain a 1:1 sex ratio in a particular species of turtle, which of the following experiments would best address this question?
A. Grow the turtles in three different incubators at temperatures of 26ºC, 28ºC, and 30ºC. B. Grow the turtles in five different incubators at temperatures of 22ºC, 24ºC, 26ºC, 28ºC, and 30ºC. C. Grow the turtles in two different incubators at temperatures of 22ºC and 30ºC. D. Grow the turtles in four different incubators at temperatures of 24ºC, 26ºC, 28ºC, and 30ºC.