Tree rings represent growth during wet and dry periods of the year. In a deciduous tree found in the north, which two seasons would contribute to tree rings?
A. summer and fall
B. winter and summer
C. winter and spring
D. spring and fall
E. spring and summer
E. spring and summer
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Which of the following is NOT a characteristic of the
plants with which Mendel worked? a. They produce male and female parts. b. They exhibit blending inheritance. c. They normally self-fertilize. d. They have many different contrasting traits and exhibit some pure-breeding varieties. e. They can easily be cross-fertilized by human manipulation.
Bacteriophages may multiply by a __________
pathway in which the new viral particles are made quickly and released by lysis. Fill in the blank(s) with the appropriate word(s).
For plants, the total amount of carbon gained by photosynthesis must be greater than that respired over their lifetime because...
What will be an ideal response?
Which component of the following reaction is the substrate? sucrose + sucrase + water ? sucrase + glucose + fructose
A) sucrose B) sucrase C) glucose D) fructose