To a person studying utilization of cage space for lions in a zoo, the most useful data would be expressed by the number
of ____.
a. total lions
b. lions per square foot
c. lions per cage per room
d. cages per zoo
e. lions of each age
ANSWER: b
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Which of the following could be a vicariance event for species in that habitat?
A) The level of water in a lake recedes, creating two lakes where there used to be one. B) Some insects get blown in a storm to a new mountain range, where they lay eggs. C) Radiation near Chernobyl increases mutation rates, causing an increase in autopolyploidy. D) Global warming allows populations of mosquitoes to survive at higher elevations.
Which type of junctions involves closable channels that connect the cytoplasm of adjoining animal cells?
a. gap junctions b. plasmodesmata c. tight junctions d. adhering junctions e. blocking proteins
Injections of growth hormone can result in four of the following effects. Which is the exception?
a. maintenance of healthy bone b. maintenance of healthy muscle c. reduction in body fat d. low blood pressure e. potential for diabetes
The easiest method of preventing sea stars from moving is to
A. plug their madreporite. B. lay them on their arboreal side. C. squeeze the tube feet as they are extended from the body. D. cut off two of their arms. E. None of these actions would prevent a sea star from moving.