Trait SpeciesABCDE100100210101310101411100511110611110The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which pair of species shares the fewest number of derived characters (synapomorphies)?
A. 6 and 3
B. 1 and 6
C. 4 and 6
D. 1 and 4
E. 2 and 3
Answer: B
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Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones. Requirements for facilitated diffusion include
A. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. B. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. C. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always against the concentration gradient, never with the gradient. D. The carrier molecule must be specific to the molecule that is transported and an ATP molecule must be attached to the specific carrier. The direction of movement is always against the concentration gradient, never with the gradient.
The structures indicated by the arrows in Figure 4-3 are:a
intermembrane space. b. grana. c. cristae. d. matrices. e. plastids.
Differential reproductive success is equivalent to:
a. evolution. b. competition. c. mutation. d. natural selection. e. adaptation.
Which of the following pairs has the most similar chemical properties to each other?
A) 12C and 14C B) 1H and 22Na C) 1H and 2He D) 12C and 28Si E) 16O and 32S