What number is/are enveloped helical virus(es)?
What will be an ideal response?
4
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A 36-year-old woman is on a cruise ship and later develops nausea, abdominal pain, vomiting, and diarrhea. She is most likely suffering from which virus?
a. Norovirus b. Rotavirus c. Coronavirus d. Torovirus
A type of fungus that produces toxic alkaloids is
a. Aspergillus. b. the death cap mushroom. c. ergot. d. the Psilocybe mushroom
Answer the following statements true (T) or false (F)
1. Genetic drift is when an individual from one population is introduced into a new population, introducing new alleles. 2. The presence of the traces of pelvic bones in both whales and snakes indicate that they descended from an ancestor that once had legs. 3. The theory of evolution can accurately explain the origin of life on Earth. 4. Organisms can have forms that look similar but come from very different evolutionary ancestors. 5. The fact that mitochondria cannot live outside of the cell suggests that ancestral cells engulfed and kept alive free-living prokaryotic anaerobes.
Two species interbreed occasionally and produce vigorous, fertile hybrids. When the hybrids breed with each other or with either parent species, however, the offspring are feeble or sterile. These species are affected by
A) gametic isolation. B) reduced hybrid fertility. C) reduced hybrid viability. D) hybrid breakdown.