A biologist has been studying a mollusk that does not have a shell. It lives in the marine environment. Of the examples given below, which one did the biologist study?
A. clam
B. chiton
C. octopus
D. nautilus
E. snail
Answer: C
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In sponges, spicules are secreted by ____
a. amoeboid cells b. choanocytes c. sperm cells d. porocytes e. pinacoderm
The following statements related to electrons
are correct, EXCEPT one. Select the EXCEPTION.
a. Electrons closest to the nucleus are at the lowest energy level. b. Electrons are negatively charged. c. Electrons cannot move from the place in their orbital. d. The innermost orbital holds two electrons. e. At the second energy level, there are spaces for a maximum of eight electrons
Flexors are what?
What will be an ideal response?
Pseudostratified epithelium is found
A. in the nervous tissue. B. lining parts of the respiratory tract. C. in the glands. D. on the skin. E. in the liver.