The joint between vertebrae is an example of a ____ joint
a. cartilaginous
b. synovial
c. fibrous
d. spongy
e. intervertebral
ANSWER: a
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Molecular clocks are usually calibrated based on
A. guesses about the rates of mutations in a particular gene. B. observed rates of mutation in a particular gene. C. the first shared common ancestor for species known from the fossil record. D. comparing the gene to similar genes in other kingdoms. E. the date when two species diverged from a common ancestor.
What occurs when the resiratory center stops sending nerve signals to the diaphragm and the rib cage?
A) Muscles contract and inspiration occurs B) Muscles relax and inspiration occurs C) Muscles relax and expiration occurs D) Muscles contract and expiration occurs
Sensory receptors respond to changes in the environment called ________
Fill in the blank(s) with correct word
Bacterial ____ may be used as cloning vectors.
A. transcriptase B. ligase C. endonuclease D. plasmids E. polymerase