The word prokaryotic means
a. having many nuclei.
b. having two nuclei
c. before the nucleus.
d. having a membrane-bound nucleus.
e. having a nucleus with no DNA.
C
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How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top-level predators?
A) Top-level predators are destined to have small populations that are sparsely distributed. B) Predators have relatively large population sizes. C) Predators are more disease-prone than animals at lower trophic levels. D) Predators have short life spans and short reproductive periods. E) Top-level predators are more likely to be stricken with parasites.
Which of the following statements comparing Enterobius vermicularis and Diphyllobothrium latum is incorrect?
A. Both helminths affect primarily children. B. D. latum has fish as an intermediate host, whereas E. vermicularis has no intermediate host. C. E. vermicularis is best treated with mebendazole, whereas D. latum is susceptible to praziquantel. D. Symptoms of both infections are mild.
The balance between osteoblast and osteoclast activities is an example of homeostasis and is regulated by the action of two hormones.
a. true b. false
If an autosomal ____________________ allele is very common in a population, there is a chance that it will enter the
pedigree from outside the family. Fill in the blank(s) with the appropriate word(s).