You have a small tree in your yard that is the height that you want it, but does not have as many branches as you want. How can you prune it to trigger it to increase the number of branches?
A) Cut off the leaves at the ends of several branches.
B) Cut off the tips of the main shoots.
C) Cut off lower branches.
D) Cut off the leaves at the base of most of the branches.
B
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You are given 100 acres of land and asked to use the land for long-term reduction of atmospheric CO2 levels. Which of the following is the best use of the land for this purpose?
A. Plant a rapidly growing grass that can be harvested every year and used to make ethanol that is added to gasoline. B. Plant slow-growing, bristle-cone pine trees that are known to live for thousands of years and reach a height of about 6 feet. C. Plant corn that is used to feed pigs that are then harvested for sausage meat that is sold at the grocery store. D. Plant a regular lawn and use the land as a park to encourage the local population to exercise more. E. Plant trees that grow rapidly, reach a huge size, and live for a long time.
B and T lymphocytes are specific; they have only a single type of cell marker on their surface.
Answer the following statement true (T) or false (F)
“Genetic fingerprinting” is based on unique
a. nucleotide base pairing b. types of nucleotides c. differences in tandem repeats. d. ratios of purines to pyrimidines e. bonding patterns between nucleotides
Which of the following enzymes is responsible for transcribing tRNA in eukaryotic cells?
A) RNA polymerase I B) RNA polymerase II C) RNA polymerase III D) primase E) RNase H