Explain how leeches are used today in medical replants and transplants
What will be an ideal response?
Answer: Leeches produce anticoagulants and vasodilators that both increase the flow of blood. Replants or transplants that do not have a sufficient number of functional veins will likely fail due to low oxygen content. Leeches can be applied to the replant or transplant area to facilitate the movement of fresh blood into the site so that it does not fail.
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The area with the highest species diversity among the following is:
a. rocky subtidal. b. sandy subtidal. c. sandy intertidal. d. rocky supratidal. e. splash zone.
In large populations, the Hardy-Weinberg equilibrium principle can be used to determine whether evolution is occurring
For instances where allelic frequencies are indicated by p and q, the resultant genotype frequencies are indicated by which of the following equations? A) p2 + q2 B) p2 + pq + q2 C) p2 + 2pq + q2 D) p2 + (pq)2 + q2
What does the conjugated system arrangement in pigments result in?
a. delocalization of protons b. localization of electrons c. delocalization of electrons d. localization of protons
Maintaining a constant cell population in a chemostat requires the monitoring and control of
a. nutrient concentrations. b. the dilution rate of volume pumped in. c. the population's waste products. d. all of the above.