In a search for new antibiotics, a previously unknown organism has been recovered from the soil. It is nonmotile and is composed of long threadlike structures formed from nucleated cells. It is not-photosynthetic and absorbs its nutrients. This organism will most likely be classified among the
A. Eukaryotes (Fungi)
B. Archaea
C. Eukaryotes (Algae)
D. Eukaryotes (Protozoa)
E. Bacteria
Answer: A
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Below is a list of phenomenon that can occur in a population, which of these would violate the conditions for the Hardy-Weinberg equation?
A. The population is large. B. Mating is nonrandom. C. Migration does not occur between different populations. D. Natural selection is not occurring. E. No new mutations arise.
The atmosphere of the early Earth is currently thought to have contained:a
carbon dioxide, water, oxygen, nitrogen, and hydrogen. b. carbon dioxide, water, carbon monoxide, hydrogen, and nitrogen. c. carbon dioxide, carbon monoxide, water, hydrogen, and nitric oxide. d. carbon dioxide, ozone, nitric oxide, water, and hydrogen sulfide. e. methane, water, ammonia, nitrogen, and oxygen.
Which event is likely to add the most carbon dioxide to the atmosphere?
a) development of a hurricane in the Gulf of Mexico b) leakage from a nuclear reactor in Japan c) clear-cutting of trees in the Brazilian rain forest d) eruption of a volcano in Iceland
TLRs are
A. phagocyte receptors that detect PAMPs. B. the coatings of pathogens by complement. C. molecules that damage cells, resulting in cell lysis. D. present in intact skin, sebum, tears, etc. E. nonspecific leukocytes that secrete toxins onto the surface of virally infected cells.