The sex of most mammals, birds, and insects is determined by:
a. the temperature.
b. the external environment.
c. sex chromosomes.
d. chance.
e. the internal envronment.
C
You might also like to view...
From the following, identify that portion of the brain that is NOT considered part of the limbic system
a. amygdala b. olfactory bulbs c. cerebellum d. hippocampus e. “emotional brain”
Which of the following characteristics is an example of a qualitative trait?
A) flower color B) arm length C) body weight D) root length
Which of the following layers of the human eye contains the photoreceptors?
Which of the following is an appropriate interpretation for these graphs? 
Maternal care (as measured by minutes crouching over offspring and proportion of pups retrieved) in female mice that have the fosB allele is
A. the same as the maternal care given by female mice without the fosB allele. B. less than the maternal care given by female mice without the fosB allele. C. not possible to determine from the data. D. less than the maternal care given by female mice without the fosB allele; however, the graphs depict only minor differences, which are most likely not significant. E. greater than the maternal care given by female mice without the fosB allele.