How is the recipient cell different at Time D than it was at Time A?
A) It has a greater number of genes.
B) It has a greater mass of DNA.
C) It has a different sequence of base pairs.
D) It contains bacteriophage DNA.
C
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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.
Some protists have a pellicle, which is used for
a. defensive purposes. b. sexual reproduction. c. structural support. d. water absorption. e. food storage.
Bilateral symmetry is characteristic of:
a. cnidarians b. sponges c. jellyfish d. flatworms e. coral polyps
The classification/identification system in the text uses this sequence of characteristics to group viruses:
A) host organism, capsid type, envelope presence/absence B) nucleic acid type, envelope presence/absence, double- vs. single-stranded nucleic acid C) nucleic acid type and strandedness, envelope presence/absence, host organism D) viral size, shape of capsid, host organism