All of the populations of different species that occupy and are adapted to a given area are known as ____
a. the biosphere
b. a community
c. an ecosystem
d. a niche
e. the habitat
ANSWER: b
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Meerkats are small desert mammals that live in groups of 20–50 animals. You observe a female meerkat standing upright on a stump, looking around. Eight of her young nieces and nephews are foraging for food around her
You hypothesize that this is an example of kin selection. Which of the following supports your hypothesis? A. All adults in the group, including those that are not related to the young meerkats, are standing upright and looking around. B. The female meerkat in the question takes food from the foraging nieces and nephews when they find it. C. The female meerkat in the question spends her energy in all activities that involve caring for the young meerkats. D. Other aunts and uncles of the young meerkats are foraging, and do not spend any time standing up and looking around. E. All adults in the group, including those who are not related to the young meerkats, spend energy in all the activities that involve caring for the young meerkats.
In many animals, this polysaccharide is found in large quantities in liver and muscle cells. It is highly branched, with
many a(1-4) and a(1-6) linkages.
a. chitin b. amylopectin
c. cellulose d. glycogen e. amylose
As the concentration of a specific biochemical in a sample increases, the intensity measurement for that biochemical decreases
a. True b. False
Two genes that evolved from the same common ancestral gene, but are now found as homologs in different organisms, are called:
A. orthologs. B. pseudologs. C. paralogs. D. heterologs.