Which of the following would bear the most resemblance to Archaeopteris, an ancient plant genus that preceded gymnosperms and angiosperms?
A. a pine tree that does not produce cones
B. a grass species that lacks flowers
C. a cycad that does not produce coralloid roots
D. a sunflower that does not produce endosperm
E. a ginkgo lacking vascular tissue
Answer: A
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The streamlined shape of the dolphin, seal, and other swimming animals is most important for
A. overcoming the forces of gravity acting on the animal. B. reducing the mass of the animal's body. C. maintaining a consistent speed in the dense medium. D. reducing drag from the water they must swim through.
Why do heavy consumers of alcohol gain weight?
a. Alcohol contains an excessive amount of calories. b. Ethanol is converted directly to fat molecules. c. Oxygen is diverted from breaking down fatty acids to break down ethanol. d. Ethanol inhibits the action of peroxisomes which work to break down fatty acids. e. The hydroxyl group on ethanol is transferred to fatty acids causing them to be stored as fat.
A group of identical organisms that are all descendants from a single ancestor is known as a(n) ________
Fill in the blank(s) with correct word
What type of genetic cross involves two traits?
What will be an ideal response?