The principal difference between simple and stratified epithelium is in the number of
a. cell layers.
b. total cells.
c. nuclei per cell.
d. free surfaces.
e. microvilli.
A
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In which of the following stages of the cell cycle would you find chromosomes separated into individual chromatids?
A. prophase B. metaphase C. telophase D. cytokinesis
If a person overdosed on depressant-type drugs that slow down breathing, in what direction would the reaction shift? Explain your answer. 
What will be an ideal response?
Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra B. seminal vesicles, vas deferens, prostate, urethra, ejaculatory duct C. vas deferens, epididymis, seminiferous tubules, ejaculatory duct, urethra D. vas deferens epididymis, seminal vesicles, ejaculatory duct, urethra E. epididymis, seminiferous tubules, ejaculatory duct, vas deferens, urethra
In his study of the foraging behavior of bumblebees, D. W. Inouye noted that both Bombus appositus and Bombus flavifrons feed from both larkspur and monkshood flowers when each is the only bumblebee species present
However, when both species are present, B. appositus feeds on only larkspur and B. flavifrons feeds on monkshood. This behavior is an example of A) habitat fragmentation. B) resource partitioning. C) predation. D) aggressive mimicry. E) intraspecific competition.