Adaptations for deep diving in cetaceans include all the following except:
a. expelling air from the lungs.
b. large lungs with large number of air sacs.
c. rib cage that can collapse.
d. sonar for detecting the depth.
e. high red blood cell count
D
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All EXCEPT which of the following statements
about Neandertals is true? a. The oldest Neandertal fossils are 200,000 years old. b. They lived in Europe and the Near East. c. Neandertals are direct ancestors of Homo sapiens. d. Neandertal brains were larger than those of modern humans. e. They have no modern descendents.
Cartilage lacks
a. matrix. b. collagen. c. blood vessels. d. cells. e. ground substance
Which of the following plant growth responses is primarily due to the action of auxins?
A) leaf abscission B) cell division C) the detection of photoperiod D) phototropism
Why are human males much more likely than human females to inherit the recessive condition hemophilia (a failure of the blood to clot properly)?
A. the gene for hemophilia is carried on the Y chromosome B. the hemophilia gene is carried on an autosome C. the gene for hemophilia is sex-linked D. hemophilia is the wild type