Which is not true of the cell membrane?
A) It is made up of a phospholipid monolayer.
B) It can seal tiny breaks in itself.
C) It is selectively permeable and can regulate passage of material through it.
D) Many kinds of proteins are embedded in the membrane
Ans: A) It is made up of a phospholipid monolayer.
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In the figure above, which species is the stronger competitor?
A) species 1 B) species 2 C) Both species compete equally. D) It is not possible to tell from this figure.
Where is blood flow slowest?
a. arteries b. arterioles c. capillaries d. venules e. veins
Which trait is an example of a quantitative trait in humans?
A) cheek dimples B) number of toe C) musical ability D) cystic fibrosis
The archeological record indicates when people began using various grains and legumes and when these food plants were domesticated
Looking at the figure below, estimate how long humans have been selectively breeding grains. (Note that the gaps in the figure represent periods when no evidence of the crop indicated was found.) What will be an ideal response?