Extended phenotypes are.
A. Phenotypical attributes that extend far off the body, such as male peacock feathers.
B. Phenotypes that tend to extend the longevity of the organism such as carapace.
C. Phenotypes that are not genetically influenced, but are instead "extended" to a species through epigenetic induction due to environmental factors.
D. Phenotypes that extend outside of the body such as creating structures, manipulating behavior of hosts, etc.
Answer: D. Phenotypes that extend outside of the body such as creating structures, manipulating behavior of hosts, etc.
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The substrate of an enzyme binds at the
A. active site. B. affinity site. C. reaction site. D. determinative site.
The rate of facilitated diffusion of a molecule across a membrane will increase as the concentration gradient of the molecule across the membrane increases to a certain point. Eventually, an increase in the concentration of the molecule will not cause any further increase in facilitated diffusion. Thus, there is a maximal rate of facilitated diffusion. This is because
A) the diffusion constant depends on the concentration gradient. B) the increased concentration gradient causes a situation far from equilibrium. C) there are a limited number of carrier proteins in the membrane. D) as the concentration gradient increases, molecules interfere with one another. E) facilitated diffusion requires ATP energy.
Why is snail fever a common name for infections with Schistosoma?
A. The worms look like snails. B. They are contracted by eating snails. C. Snails are the intermediate host. D. Physical contact with snails may result in infection. E. The larval stage looks like a snail.
Severe Acute Respiratory Syndrome (SARS)
A. is not highly transmissible. B. is caused by the respiratory syncytial virus. C. can cause high fever, pneumonia, respiratory distress. D. began with an initial outbreak in the United States and then spread to Canada and China. E. All of the choices are correct.