A good experimental design should
A. be designed to prove a hypothesis is correct.
B. be able to be repeated.
C. not have an independent variable.
D. All of these statements are true.
B. be able to be repeated.
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Tetanus can be spread by accidentally stepping on a rusty nail. This is an example of _____ transmission.
Fill in the blank(s) with the appropriate word(s).
A somatic cell from a corn plant normally contains 20 chromosomes. How many sister chromatids would that cell contain during G2 of the cell cycle?
A. 0 B. 10 C. 20 D. 40 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about sister chromatids? How does it relate to the question? 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?
Which of the following matings would have the highest frequency of chromosomal gene transfer?
A. F+ x F- B. F' x F- C. Hfr x F-
Possible evolutionary relationships, when determined solely by the study of comparative morphology, may be incorrect due to
a. morphological divergence. b. morphological convergence. c. adaptive radiation. d. extinction. e. homology.