Yeast are
a. single-celled fungi.
b. multicellular plants.
c. single-celled plants.
d. single-celled protists.
e. multicellular fungi.
A
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In multicellular organisms, the mechanism most directly responsible for directing development and maintaining homeostasis is gene
A. mutation. B. duplication. C. deletion. D. regulation.
If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic
fibrosis are ____.
a. 1/4 b. 1/2 c. 3/4 d. 1 e. 0
Which of the following best describes advantages conferred by compound leaves versus simple leaves?
a. There's a greater chance of capturing photons in intermittently shady areas. b. There is less chance of damage in high-wind areas. c. There's a reduced chance of herbivory. d. There is less surface area for water loss. e. There's a greater chance of capturing photons in intermittently shady areas and less chance of damage in high-wind areas.
DNA-containing viruses are easier to fight and treat than RNA viruses because:
a. antibiotics work only on DNA viruses, not on RNA viruses. b. RNA viruses have relatively stable genomes and so cannot be inactivated by mutagenic drugs. c. DNA viruses do not change rapidly.