Yeasts are able to communicate with each other
A) by close cell-to-cell contact.
B) through chemical signaling.
C) only if they can touch each other and have merged cell walls.
Answer: B
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The lac operon is an example of ________ control in which the presence of an ________ is required for transcription to occur
A) negative / activator B) negative / inducer C) positive / activator D) positive / inducer
From his monohybrid experiments, Mendel
determined that __________is the dominant form. a. wrinkled seed b. yellow pod c. dwarf plant height d. yellow seed e. white flower
Hensen's node is located:a
in the walls of the archenteron. b. at the end of the primitive streak. c. on the outer side of the chorion. d. inside a blastomere. e. inside the neural groove
All of the following are considered examples of type I hypersensitivity EXCEPT
A) asthma. B) dust allergies. C) penicillin allergic reactions. D) pollen allergies. E) transplant rejections.