A sponge body type with many chambers lined with collar cells is called:
a. asconoid.
b. syconoid.
c. leuconoid.
d. hexactinellida.
e. demospongoid.
C
Biology & Microbiology
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Which of the following is NOT an enzyme?
a. amylase b. bile c. lipase d. pepsin e. trypsin
Biology & Microbiology
In response to induction by the optic vesicle,
a. genes coding for crystallin and keratin are activated. b. genes coding for only crystallin are activated. c. genes coding for only keratin are activated. d. genes coding for crystalline and keratin are not activated. e. apoptosis occurs.
Biology & Microbiology
A pH of 4 is __________ times more __________ than a pH of 7
a. 3; basic b. 3; acidic c. 1000; neutral d. 1000; basic e. 1000; acidic
Biology & Microbiology
__________ have shells made of calcium carbonate, while __________ have shells made of glassy silica.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology