The data of Huey and colleagues (1989 ) on thermoregulation in garter snakes is an example of the ________ method evolutionary biologists use to test hypotheses about adaptations
A) situational
B) experimental
C) observational
D) phylogenetic contrast
E) comparative
C
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With regard to tight junctions,
A) one face of the cell, the apical surface, is in contact with other cells. B) they allow free movement of ions and molecules between cells. C) they are responsible for holding cardiac muscle together. D) they are composed of special proteins called connexins. E) they block the movement of basolateral integral membrane proteins to the apical surface.
Which of the following structures is not a modified leaf?
1.petal 2.sepal 3.carpel 4.anther
Which structure is more advanced in this group than
in other reptiles? a. A b. B c. C d. D e. none of these
Which feature is found in all cells?
a. nucleus containing DNA b. plasma membrane composed of phospholipids c. flagella d. cell wall composed of cellulose e. nucleoid region that contains DNA