One way to kill a tree is to girdle it by cutting a groove a centimeter into the bark all around the trunk of the tree. The tree will typically survive that growing season, but will die over the winter. Why wouldn't girdling work on a large grass?
A. Monocots do not have vascular bundles.
B. Eudicots do not have vascular bundles.
C. Grasses have taproots.
D. The vascular bundles are scattered throughout the ground tissue.
E. The vascular bundles are in a ring just under the bark.
D. The vascular bundles are scattered throughout the ground tissue.
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Animals that are hermaphroditic usually
a. fertilize their own eggs. b. cross-fertilize. c. donate eggs to other individuals. d. cannot reproduce sexually. e. fit all of these descriptions
Blood glucose levels are regulated by
a. insulin. b. glucagon. c. cortisol. d. insulin and glucagon only. e. insulin, glucagon, and cortisol.
The removal of electrons and/or hydrogen atoms from a substrate is called what?
a. phosphorylation b. an enzyme-substrate complex c. metabolism d. oxidation e. reduction
Why are there fewer tRNA anticodons than the 61 needed to match each mRNA codon that codes for an amino acid?
A. There is some flexibility in pairing between all 3 bases of the codon and all 3 bases of the anticodon. B. There is some flexibility in pairing between the 5' base of the codon and the 3' base of the anticodon. C. There is some flexibility in pairing between the middle base of the codon and the middle base of the anticodon. D. There is some flexibility in pairing between the 3' base of the codon and the 5' base of the anticodon.