In vertebrate evolution, the appearance of the vertebral column led most directly to development of
a. limbs such as arms and legs
b. jaws
c. sense organs and the nervous system
d. more efficient breathing systems
e. greater speed of locomotion
Answer: b. jaws
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Animal genes transferred into plant cells cannot be transcribed and translated into proteins
a. True b. False Indicate whether the statement is true or false
Refer to Figure 22-2. The common hominoid ancestor would be labeled __________ in the diagram
a. 13
b. 12
c. 11
d. 10
e. 9
The word “echinoderm” refers to
a. rounded skin b. smooth skin c. crusty skin d. spiny skin e. none of the above
This type of mechanoreceptor is found in the lips, nipples, and fingertips and helps us to precisely determine contact with something else
A) free nerve endings B) Pacinian corpuscles C) Meissner's corpuscles D) hair root plexus