List several functions of epithelial tissues
What will be an ideal response?
Epithelial tissues cover our outer and inner body surfaces; they protect the underlying tissues; many form glands that may produce enzymes, hormones, or other substances, and may be involved in absorption of nutritive molecules, respiratory gases, etc., across their surface.
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Secondary xylem contains all of the following cell types except:a
tracheids. b. vessel elements. c. sieve tube elements d. fibers. e. parenchyma
In a large experimental Drosophila population, the relative fitness of a recessive phenotype is calculated to be 0.90, and the mutation rate to the recessive allele is 5 x 10^-5. If the population is allowed to come to equilibrium, what allele frequencies can be predicted?
a. q hat = 0.5 and p hat = 0.5 b. q hat = 0.22 and p hat = 0.78 c. q hat = 0.022 and p hat = 0.978 d. q hat = 0.000055 and p hat= 0.999945
LDLs should make up about what percentage of total blood lipids?
a. 10 percent
b. 20 percent
c. 30 percent
d. 40 percent
e. 50 percent
Many bacterial infections of the lower digestive tract are treated with
A) antitoxin. B) penicillin. C) water and electrolytes. D) quinacrine. E) thorough cooking.