Plasmodium, the cause of malaria, undergoes multiple mitoses before the release of uninucleate daughter cells called
a. gametocytes
b. schizonts
c. coencytes
Answer: b. schizonts
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Biological evolution differs from chemical evolution in that it would have been possible only after the development of
A. a metabolic pathway. B. enzymes. C. true cells. D. nucleic acids.
Which of the following describes the difference between fungal endomycorrhizae and fungal endophytes?
A. Endomycorrhizae live inside fungi and provide them with nutrients and water, and endophytes live inside plants, often parasitizing them and slowly breaking down their structure. B. Endomycorrhizae form arbuscules that facilitate exchanges of water and food between the fungus and plant root cells, whereas endophytes invade plant cells and provide the plant with protective antibiotics and toxins. C. Endomycorrhizae are beneficial to its host plant but endophytes harm the host plant. D. Endomycorrhizae form arbuscules on plant roots that produce toxins killing parasitic nematodes, whereas endophytes assist in the transport of water through the plant. E. None of these are correct.
The use of isotope decay to determine the age of rock samples that contain fossils is known as ____
a. fossilization decay b. fossilization dating c. biogeography d. plate tectonics e. radiometric dating
Which of the following is not true of RNA processing?
A. RNA splicing can be catalyzed by spliceosomes. B. Nucleotides may be added at both ends of the RNA. C. Exons are cut out before mRNA leaves the nucleus. D. A primary transcript is often much longer than the final RNA molecule that leaves the nucleus. E. Ribozymes may function in RNA splicing.