In meiosis, centromeres split in
A. telophase I.
B. anaphase I.
C. telophase II.
D. anaphase II.
D. anaphase II.
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A hominin of Europe and Asia that became
extinct nearly 30,000 years ago was a. a dryopith. b. Australopithecus. c. Homo erectus. d. Homo neanderthalensis e. Homo floresiensis.
The five groups of archaea are:
a. Psychrophilic, carcinogenic, halophilic, high- and low-pH tolerant, and high-pressure tolerant b. Anaerobic, aerobic, thermophilic, high- and low-pH tolerant, and methanogenic c. thermophilic, halophilic, high- and low-pH tolerant, high-pressure tolerant, and methanogenic d. Anaerobic, aerobic, thermophilic, high-pressure tolerant, and hydrophilic e. Archaea are not divided into groups; they are a specific group of their own.
What do Echinococcus granulosus, Entamoeba histolytica, and Enterobius vermicularis have in common?
A) They are transmitted by insect vectors. B) They live in the intestines of their definitive host. C) They are intracellular parasites. D) They cause zoonoses in humans. E) They are diagnosed by examination of a blood smear.
How are X rays used in the technique of X-ray diffraction?
A) The scattering of X rays by a purified form of a molecule reveals its structure. B) Cells are broken open to release chromosomes by being bombarded with X rays. C) DNA strands are separated by X-ray energy, revealing the order of bases. D) The X rays are used to mutate DNA to determine the location of genes. E) Enzymes are destroyed by X rays, revealing the order of steps in metabolism.