In which tissues is the presence of cilia a common feature?
a. in some muscle tissues
b. in some epithelial tissues
c. in some nervous tissues
d. in some connective tissues
Ans: b. in some epithelial tissues
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Trichophyton schoenleinii causes a condition that is characterized by the formation of yellowish cup-shaped crusts or scutulae, considerable scarring of the scalp, and sometimes permanent alo-pecia. This organism is usually recovered in _____ days
a. 5 to 7 b. 14 c. 21 d. 30
Plasma cells
A. secrete antibodies. B. function in allergic reactions. C. suppress immune reactions. D. activate B cells and other T cells. E. directly destroy target cells.
Archaeans are similar to bacteria in all of the
following ways EXCEPT a. size. b. shape. c. membrane phospholipids. d. absence of a nucleus. e. presence of operons.
Calculate the maximum sustainable yield for a population whose carrying capacity (K) is 100,000 and whose per capita rate of growth (r) is 0.1.
Fill in the blank(s) with the appropriate word(s).