The ancestor to all plants is believed to be

a. a green alga.
b. a red alga.
c. a brown alga, like kelp.
d. a diatom.
e. a sea grass.


A

Biology & Microbiology

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Substances that can readily pass through the cell membrane are chemically ________ in nature.

Fill in the blank(s) with the appropriate word(s).

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Slime molds move about in a way similar to ____

a. water molds b. fungi c. amoebas d. dinoflagellates

e. ciliates

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Where in the cell does the citric acid cycle happen?

a. Ribosomes b. Nucleus c. Endoplasmic reticulum d. Matrix of the mitochondria

Biology & Microbiology

The phospholipid molecules of most membranes

have a. a hydrophobic head and a hydrophilic tail. b. a hydrophobic head and a hydrophobic tail. c. a hydrophobic head and two hydrophobic tails. d. a hydrophilic head and two hydrophobic tails. e. none of these.

Biology & Microbiology