When a drop of food coloring is placed in a container of clear water, the colored dye molecules ____
a. diffuse to a different location by osmosis
b. diffuse to a different location by active transport
c. concentrate at the top of the container
d. diffuse equally throughout the container
e. stay at the bottom of the container
ANSWER: d
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A cuticle
a. resists water loss. b. covers epidermal cells. c. may contain waxes and cutin. d. resists attack by microorganisms. e. does all of these.
The kidney controls the water balance in the body.
a. true b. false
Which of the following statements is true?
A. Glycolysis occurs in the mitochondria inner membrane. B. The citric acid cycle occurs in the cytosol. C. Electron transport chain and ATP synthase are in the cytosol. D. The citric acid cycle occurs in the mitochondria matrix. E. Oxidative phosphorylation occurs in the mitochondria matrix.
Which animal phylum lacks a network of nerve cells for gathering information from the environment?
A. Porifera - sponges B. Cnidaria - jellyfish, sea anenomes C. Platyhelminthes -- flatworms D. Nematoda - roundworms E. Mollusca - octopus, squid, clams, snails, and other mollusks