Four of the five answers below are correct statements about exoskeletons. Select the exception
a. an exoskeleton consists of noncellular secreted material.
b. repeatedly producing new exoskeleton uses resources that the animal could put towards growth and reproduction.
c. the exoskeleton is made of bone and cartilage.
d. the exoskeleton protects the soft body tissues inside it.
e. exoskeletons exist in some invertebrates.
c
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Cells of Staphylococcus aureus are cocci measuring about 1 ?m in diameter. In a textbook image of S. aureus, each cell measures about 1 cm. The magnification of the image on the page is ________.
A. 0.001X B. 10,000X C. 0.0001X D. 1,000X E. 100X F. 0.01X G. This is impossible to calculate without more information.
What species of Rhizopus may infect people who
have a weakened immune system? a. R. oryzae b. R nigicans c. R. stolonifer d. R. arrhizus e. any of these
A farmer decides to go into the business of raising trout for tourists who enjoy fishing. She builds six trout ponds and stocks each of them with trout from genetically identical stock. Her friends tell her that because she started each pond with just a
few trout, she has created a bottleneck effect and her trout populations are likely to become genetically different rapidly. Which of the following statements about her trout is likely true? A) Because they are all genetically alike, they will all remain alike even though the ponds are different. B) Because each population started off genetically identical, any mutation that occurs in one pond will also occur in the others. C) Because the ponds are different and the populations are likely to experience different mutations, the populations will likely diverge evolutionarily, but only over many generations. D) The increase in genetic diversity caused by sexual reproduction will promote evolutionary divergence over time.
Which of the following is in the correct order?
A. metaphase, anaphase, cytokinesis, telophase B. interphase, prophase, metaphase, anaphase, telophase C. cytokinesis, metaphase, anaphase, telophase D. prophase, cytokinesis, telophase, anaphase E. All of these choices are correct.