In addition to their characteristic cilia, most ciliates contain two types of
A. nuclei.
B. chloroplasts.
C. flagella.
D. wood-digesting enzymes.
E. cysts.
A. nuclei.
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Goiters are often produced in the ____ , a gland that plays a key role in metabolism by secreting the thyroxine and triiodothyronine hormones
Fill in the blank with the appropriate word.
The menigococcus attach to the mucus membrane via
A. flagella. B. pili. C. cilia. D. a capsule.
Most species of ctenophore are:
a. haploid. b. male or female only. c. hermaphroditic. d. asexual. e. none of the above
In his comprehensive theory, Steve Hubbell assumes that all species are competitively equivalent and that they have identical fitnesses— their probabilities of death and reproduction are the same. How do we characterize such species (and, indeed, Hubbell's theory)?
A) polarized B) neutral C) niche-differentiated D) complementary