The basic taste sensations are different in that each sensation works through:
A) different ciliated receptor varieties, just like smell receptors.
B) a different chemical reaction route in a taste cell.
C) a similar chemical reaction route in a taste cell.
D) different taste nerves.
Answer: B
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Which of the following is not an adaptation of conifers to dry or cold conditions?
A. conical shape of tree B. scalelike or needle-shaped leaves C. flexible branches D. waxy cuticle E. production of resin
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.
All biological research is undertaken with the explicit or implicit recognition that ____
a. Charles Darwin's view of evolution put forth in The Origin is without error b. all forms of life are related and have evolved from ancestral forms c. all species share the same common ancestor d. the products of evolution are easily predicted e. the theory of evolution can be ignored unless the research is explicitly examining evolutionary process
How or where do most transcription regulators bind?
a. to the major groove of RNA b. as dimers c. to the minor groove of DNA d. to a DNA sequence called the homeodomain e. to a DNA sequence called a leucine zipper