When can we say that atom has no vacancy, or the atom is full?
A. An atom's outer shell is filled with electrons
B. An atom's inner shell is filled with electrons
C. An atom's outer shell is filled with neutrons
D. An atom's outer shell is filled with protons
E. An atom's inner shell is filled with protons
Answer: A
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cephalization refers to the trend for animals with more complex body types to
A. concentrate nervous tissue in the anterior (head) end of the animal. B. become bilaterally symmetrical. C. develop a brain with clear divisions between "gray" and "white" matter. D. develop a segmental organization to the nervous system. E. concentrate sensory organs in the anterior end of the animal.
An available nutrient molecule ____
a. exists in living or dead tissues b. cannot be assimilated by organisms c. can be assimilated by organisms d. exists in rocks and soil e. exists as an ion
In bacteria, the cell wall is composed mainly of
a. peptidoglycans. b. lipids. c. glycoproteins. d. proteins. e. various polysaccharides.
A cat and a dog share a space in the barn. The cat gives birth to kittens in the dog's bed and then leaves them alone
Later, you notice that the kittens follow the dog around during the day. This is an example of which type of behavior? a. imprinting b. habituation c. classical conditioning d. operant conditioning e. insight learning