Skeletal muscle makes up about __________ percent
of the weight of an average person.
a. 10
b. 20
c. 30
d. 40
e. 50
Answer: d
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Lake Victoria is famous for its variety of cichlid fishes. In fact, they offer the most diverse assembly of vertebrates presently known to science. One trait that scientists have focused on as one possible reason for their adaptability is
A. a second set of scales that lie beneath the top outermost scales. B. a second set of jaws in their throats. C. gill arches that are not covered by an operculum, which prevents hiding places for gill parasites. D. digestive tracts that are able to process most substrates, which has eliminated the need for feeding specialization. E. ability to change color in relationship to their environment.
The arrows in the diagram below are pointing
to
a. the esophagus and small intestine. b. the trachea and large intestine. c. the sphincters at the top and bottom of the stomach. d. the esophagus and pancreas. e. the stomach
The above figure represents
a. petunia eggs. b. pine pollen. c. pansy spores. d. petal fragments. e. poppy seeds.
Layer of dense connective tissue, surrounding cartilage like a girdle. Helps cartilage to resist outward expansion. Contains blood vessels for nutrient delivery to cartilage.
What will be an ideal response?