What is the function of a land plant’s waxy cuticle?
a. Preventing water loss from aerial surfaces
b. Secreting toxic compounds to deter animals
c. Enabling the root system to extend deeper
d. Providing rigidity to stems and leaves
a. Preventing water loss from aerial surfaces
The function of a land plant’s waxy cuticle is to prevent water loss from aerial surfaces.
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The majority of prokaryotic DNA is arrayed in:
A. multiple circular chromosomes. B. a single circular chromosome. C. a single linear chromosome. D. multiple linear chromosomes.
Which of the following statements about structural maintenance of chromosomes (SMC) proteins is true?
A. They have four distinct domains: N, C, and two ?-helical coiled-coil domains. B. They are usually dimeric and dimerization forms the ATP-binding site. C. Dimers of SMC proteins are all homodimers having identical subunits. D. Dimerization of SMC proteins creates a molecule with two heads and two ATP-binding sites. E. The ATP bound by SMC proteins is hydrolyzed before the heads come together in the dimer.
A man is standing in line behind you, and you notice that he is coughing up bloody phlegm. He seems underweight and fatigued. Which of the following is the most likely diagnosis given the information in this chapter?
A) a cold B) asthma C) tuberculosis D) heart disease
We think of termites as insects that "eat" wood. In fact, however, termites rely on a variety of eukaryotic and prokaryotic gut microbes to digest cellulose—without the microbes, the termites will ingest wood, but will starve
This, then, is an example of a(n); A. obligate mutualism B. obligate antagonism C. facultative mutualism D. facultative antagonism E. none of the answer options are correct.