Which group has a tentacle ringed mouth and a gastrovascular cavity?
a. sponges
b. cnidarians
c. flatworms
d. annelids
e. arthropods
b
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An autoimmune disease occurs when:
A. immune cells react too strongly with antigens normally present on host cells. B. there is an unregulated release of cytokine by helper T cells. C. cytotoxic T cells attack B cells. D. macrophages engulf normal host cells.
Which scientist believed that species gradually
improved towards perfection due to "fluida"?
a. Lyell b. Lamarck c. Darwin d. Cuvier e. Aristotle
Soils with a pH greater than 7 are considered to be ________
Fill in the blank(s) with correct word
During inspiration the nose is not involved in:
a. removing bacteria from the air. b. warming the air. c. humidifying the air. d. removing oxygen from the air. e. removing dust from the air.