DTC genetic tests (select all correct choices):
A. can be purchased directly by consumers.
B. involve the active intervention of medical
professionals at each stage of the process,
from initial submission of samples to final
consultation with the consumer.
C. may or may not be reliable.
D. are the best way to determine whether or
not an individual carries an allele associated
with a specific disease.
E. none of these
A,C
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The resting membrane potential (inside relative to outside) of the squid giant axon is approximately
A. -300 mV. B. -70 mV. C. 0 mV. D. 70 mV. E. 300 mV.
Answer the following statements true (T) or false (F)
1. Tiktaalik is an important fossil for the understanding of phylogeny because it is an intermediate form between fish and amphibians. 2. The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences. 3. The first truly bipedal primates were the australopithecines. 4. Our species, Homo sapiens, had been in existence for approximately 1,40,000 years when it moved out of Africa and replaced Homo neanderthalis, another species of human, about 30,000 years ago.
Briefly explain how growth and differentiation in plants differs from that in animals. Use correct
terminology for any structures or tissues needed for your explanation. What will be an ideal response?
Which is not an example of virulence as an evolving property?
A) Cold viruses which generate more coughs and sneezes while allowing the host to remain mobile will have an evolutionary advantage over those that cause their host to be bedridden. B) As hosts evolve more effective defenses against a given pathogen, the pathogen in turn will evolve virulence factors to combat those defenses. C) The 1918 influenza pandemic primarily killed young adults rather than elderly persons which is more typical of influenza both before and after that time. D) Historically, smallpox appeared to shift from a highly virulent pathogen which killed its victims quickly to one that did not kill immediately but more easily spread from person to person. E) Each of these is an example of virulence as an evolving property.