What are the properties of DNA probes?
I. They are labeled with a radioactive
tracer.
II. They are short chains of nucleotides.
III. They match the targeted DNA sequence.
a. I and II
b. II and III
c. I only
d. I, II, and III
e. III only
D
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True-breeding, purple-flowered pea plants were crossed with true-breeding, white-flowered pea plants. The F1 progeny all had purple flowers. If the F1 offspring are self-fertilized, what progeny phenotypes would be expected?
A. 1 purple : 2 pink : 1 white B. 3 white : 1 purple C. 3 purple : 1 white D. all purple E. all white
Which type of epithelial cells act in absorption and secretion?
a. Columnar and stratified squamous b. Columnar and cuboidal c. Simple squamous and columnar d. Cuboidal and simple squamous e. Stratified squamous and columnar
In non-cyclic photophosphorylation, where do electrons go after being released from photosystem II?
1.through an electron transport chain and into photosystem I 2.into photosystem I, through an electron transport chain, and then into NADPH 3.back into water 4.back into photosystem II
Which of the following is a gymnosperm?
a) moss b) monocot c) horsetail d) fern e) cycad