Many childhood diseases caused by viral infections of the upper respiratory tract can usually be diagnosed by
A. inspection of the rash.
B. the type of cough.
C. the type of fever.
D. the incubation period.
A.
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A woman comes to your genetic counseling center because she knows that Huntington disease occurs in members of her family. Her paternal grandfather was afflicted, but so far her father shows no symptoms. Her two great-great grandmothers on her father's side were healthy well into their 90s, and one of her great-great grandfathers died of unknown causes at 45. Testing for Huntington disease is
extremely expensive, but she is concerned that she may fall victim to this disease and wants to plan her life accordingly. After examining her pedigree you advise her to A. not get tested because there is no possibility that she is homozygous. B. not get tested because only males in her family get the disease. C. get tested because her father could be a carrier. D. not get tested because her father is only a carrier and it is very unlikely her mother is a carrier. E. not get tested because her 40-year-old father shows no symptoms.
A scion is
A. a clone of a plant created by tissue culture in a lab. B. the root stock to which another plant part is grafted. C. a triploid zygote that develops into endoderm. D. a part of a plant that is grafted to root stock of a closely related plant. E. a tetraploid zygote formed from the union of two diploid nuclei.
For your eye to focus on this sentence:a
the ciliary muscle would need to contract for the lens to get rounder. b. the ciliary muscle would need to contract for the lens to get flatter. c. the ciliary muscle would need to relax for the lens to get rounder. d. the ciliary muscle would need to relax for the lens to get flatter. e. the ciliary muscle is not connected to the lens and therefore, not involved in vision.
Which one of the following is an example of a seed dispersed by water?
a. sunflower b. acorn c. coconut d. peach e. jack fruit