Given the same total area, studies have shown that which of the following types of preserves would be most effective in maintaining metapopulations of endangered species?
1.a large habitat patch
2.several small habitat patches
3.clusters of separate preserves connected by corridors
4.All of these are equally effective.
3
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What underlying infection should a physician immediately suspect when confronted with a patient with confirmed cryptococcal meningoencephalitis caused by Cryptococcus neoformans, and why?
A. Influenza infection. The 2 viruses are often transmitted together in respiratory droplets. B. HIV infection. People with normal immune systems generally fend off this fungal infection before it becomes clinically symptomatic. C. Varicella zoster virus (chicken pox). During the incubation period for chicken pox, and during its latency, C. neoformans has an increased ability to colonize the respiratory tract. D. Syphilis. This sexually-transmitted illness depletes CD4+ helper T cells that are necessary to directly attack the fungal infection of C. neoformans.
The formation of an infection thread is an important initial part of microbial interactions with plants in the process of ________.
A. nitrogen fixation B. sulfate reduction C. denitrification D. nitrification
Since Rubisco can either fix carbon or oxidize RuBP, what condition will be most favorable for glucose production?
A. high oxygen environment B. dry climate C. moderate temperatures D. high temperatures
In the absence of sunlight, plants are not able to engage in the Calvin cycle due to a lack of
a. ATP. b. NADPH. c. oxygen. d. Both a and c are correct.