Stone tools were first used by
a. Homo erectus.
b. Homo habilis.
c. Australopithecus afarensis.
d. Homo floreiensis.
e. Neanderthals
B
Biology & Microbiology
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Crossing over is __________.
A. the formation of tetrads B. the exchange of corresponding portions of homologous chromosomes C. the movement of genetic material from one chromosome to a nonhomologous chromosome D. an independent assortment of chromosomes
Biology & Microbiology
A primary oocyte is indicated by
a. A. b. B. c. C. d. D. e. E.
Biology & Microbiology
Refer to Figure 13-3. The component labeled B is:
a. DNase.
b. DNA polymerase.
c. RNA primase.
d. RNA polymerase.
e. reverse transcriptase
Biology & Microbiology
Sister chromatids separate during
A. prophase of meiosis I. B. anaphase of meiosis II. C. metaphase of meiosis I. D. prometaphase of meiosis I. E. metaphase of meiosis II.
Biology & Microbiology