The scientists responsible for the idea that RNA can act as a catalyst were
A. Watson and Crick.
B. Beadle and Tatum.
C. Altman and Cech.
D. Lederberg and Stanley.
C
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If the chromosome number of a typical broad bean root tip cell is 12 before mitosis, what is the chromosome number of each newly formed nucleus after mitosis has taken place?
What will be an ideal response?
In humans, ability to roll the tongue (R) is dominant to being unable to roll (r). Having freckles (F) is dominant to having no freckles (f). A freckled tongue-roller could have which of the following genotypes?
A. RRFF B. RrFf C. rrFF D. RRFF and RrFf only E. all of the answer options are correct
A neuron that engages in spatial summation acquires a mutation that causes dendrite overgrowth and promiscuous synapsing. What is the likely outcome?
A. abnormally low frequency of action potentials B. summation will not occur C. abnormally high frequency of action potentials D. action potentials with stronger depolarization Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about summation? What other information is related to the question? 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?
Juanita was in an automobile accident and received a bad bump on her head. Although she had been a slender and calm person, after the accident she began to eat a lot and have emotional ups and downs. Her body temperature also fluctuated more dramatically
than in the past. What part of her brain is most likely damaged? A) cerebellum B) fornix C) midbrain D) hypothalamus