Primary growth
a. occurs along the sides of stems.
b. is dependent upon apical meristem.
c. increases the diameter of older plants.
d. is responsible for additions to woody parts.
e. fits all of these descriptions
B
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Live birth is characteristic of:
a. marsupials only b. monotremes only c. placentals only d. marsupials and placentals e. birds only
How many chromosomes are found in a human somatic cell nucleus?
What will be an ideal response?
In peas, gray seed color is dominant to white. For the purposes of this question, assume that Mendel crossed plants with gray seeds with each other and the following progeny were produced: 320 gray and 80 white
(a) What is the most probable genotype of each parent? (b) What genotypic and phenotypic ratios are expected in the progeny of such a cross?
You are asked to give a classroom demonstration of DNA supercoiling. To do so, you take two different colored pieces of rubber tubing, twist them very tightly and excessively around each other and join the ends of the tubing appropriately. Next, you relieve the supercoiling by breaking one strand and unwinding it. In this demonstration, the breaking and unwinding to relieve the supercoiling simulates the action of
A. ligases. B. primases. C. topoisomerases. D. polymerases. E. exonucleases.