The early Earth reducing atmosphere is thought to have lacked which of the following gases?
A. N2.
B. O2.
C. CO2.
D. H2O.
E. SO4.
B. O2.
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A duplicated chromosome consists of two ______.
A. centromeres B. genomes C. sister chromatids D. centrosomes C. sister chromatids
When newborn coastal garter snakes and newborn inland garter snakes are exposed to banana slug
chemicals, the coastal snakes responded by ____ while the inland snakes ____.
a. attacking; fled b. tongue-flicking; did not tongue-flick c. feeding; did not feed d. avoiding the stimuli; tongue-flicked e. ignoring the stimuli; performed threat displays
Which of the following statements about the
electromagnetic spectrum is true? a. Infrared energy is sufficient to produce ionization. b. Infrared radiation has more energy than red radiation. c. Visible light has more energy than ultraviolet radiation. d. Chlorophyll absorbs some visible wavelengths, but not all. e. Chloroplasts absorb all wavelengths of visible light equally.
Genes located close together on the same chromosomes are referred to as ________ genes and generally ________
A) linked; sort independently during meiosis B) homologous; are inherited together C) linked; do not sort independently during meiosis D) codependent; do not sort independently during meiosis