The outer boundary of a root's vascular cylinder is a layer of cells called ____.
A. pericycle
B. cortex
C. epidermis
D. stele
E. endodermis
Answer: E
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Morgan's student Sturtevant demonstrated that the recombination frequencies between a series of linked genes is additive. Examine the following recombination data from Sturtevant, and determine the proper order of the genes on the Drosophila X chromosome. Assume y is in the 0.0 position.
A. y m v w
B. y w v m
C. y m w v
D. y w m v
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain?
Gather Content
· What do you already know about recombination frequency?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The purpose of the distasteful odor emitted from the stinkhorn fern is to
a. attract flies. b. discourage predators. c. mimic another fungus. d. prevent plants from growing nearby.
In an ecosystem, which measure of energy is the largest in amount or rate?
a. net primary productivity b. gross primary productivity c. plant respiration d. animal respiration e. plant and animal respiration combined
According to the original central dogma, what macromolecule or phenomenon is directly responsible for an organism's phenotype?
A. DNA B. mutation C. transcription D. RNA E. protein