Both a man and a woman are heterozygous for freckles. Freckles (F) are dominant over no freckles (f). What is the expected chance that their child will have freckles?
a) 50%
b) 100%
c) 25%
d) 0%
e) 75%
Ans: e) 75%
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DNA codes for the production of
a. proteins. b. minerals. c. inorganic molecules. d. vital gasses. e. water.
Zonation within a community is typically the result of differences in the
A) patterns of predation among species within a community. B) rates of reproduction among species within a community. C) patterns of competition among species within a community. D) physical characteristics of the environment across a spatial gradient.
The jawless fish that is parasitic, attaching itself to and sucking fluids from the tissues of a living fish, is the
a) hagfish. b) ray-finned fish. c) coelacanth. d) lamprey. e) skate.
You discover a fungus that contains a strange star-shaped organelle not found in any other eukaryotic cell you have seen. On further investigation, you find the following
1. The organelle possesses a small genome in its interior. 2. The organelle is surrounded by two membranes. 3. Vesicles do not pinch off from the organelle membrane. 4. The interior of the organelle contains proteins similar to those of many bacteria. 5. The interior of the organelle contains ribosomes. How might this organelle have arisen?