Which of the following neural cells provide metabolic and physical support to other neural cells?
a. motor neurons
b. neuroglial cells
c. interneurons
d. sensory neurons
b
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How does DDT in the environment affect many birds?
A. stunted growth of chicks B. chronic liver failure in adults C. advancing neurological degeneration D. failed reproduction E. None of these choices are correct
What conclusion is consistent with these results?
A researcher is studying coat color in mice. Wild-type fur in mice is brown. Three pure-breeding strains of mice with white fur have been isolated. The strains are called milky, blanc, and weiss. White fur is a recessive trait in each strain. These mice are crossed to each other in pairs and the progeny phenotypes are recorded. milky × blanc = all white progeny milky × weiss = all brown progeny blanc × weiss = all brown progeny A) All three strains have mutations in the same gene. B) All three strains have mutations in different genes. C) The milky and blanc strains have mutations in the same gene; weiss has a mutation in a different gene. D) The milky and weiss strains have mutations in the same gene; blanc has a mutation in a different gene. E) The weiss and blanc strains have mutations in the same gene; milky has a mutation in a different gene.
If all the meiofaunal organisms were eliminated from a sandy beach, how would that affect the habitat and the trophic structure of the beach?
What will be an ideal response?
The age of the twig in Figure 35-1 is __________ years
a. 0
b. 1
c. 2
d. 3
e. 5