To avoid sinking the purple sea snail
a. uses jet propulsion from the mantle to move upward.
b. has wings on its foot for swimming.
c. has gas vacuoles in its shell.
d. produces a bubble raft surrounded by mucus.
e. fills its liver with low-density oil.
D
You might also like to view...
Which of the following is true of an asymmetric carbon atom?
A) Only amino acids have asymmetric carbon atoms. B) A carbon with hydrogens attached at two locations is usually asymmetric. C) Methane has an asymmetric carbon. D) Asymmetric carbon atoms create stereoisomers. E) Molecules may have only one asymmetric carbon atom.
The part of the atom that is most involved in chemical reactivity is the
A. proton. B. neutron. C. electron. D. nucleus.
Endocrine cells in the pancreas are responsible for which of the following?
a. Regulating blood-glucose levels b. Stimulating metabolism c. Promoting the growth of body tissues d. Stimulating water reabsorption by the kidneys
Some krill appear to have an additional purpose for molting. What is this alternate purpose? a. As a defense mechanism
b. To produce bioluminescence in the water. c. To feed larger organisms in the food chain. d. To attract attention of mates.