A single water molecule (H—O—H) is held together by
A) one polar covalent bond.
B) one nonpolar covalent bond.
C) two polar covalent bonds.
D) two hydrogen bonds.
Answer: C
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After the chamber was flooded with white light, the bacteria were
a. evenly distributed throughout the chamber. b. clustered on the algal filament. c. clumped along certain areas of the algal filament. d. actively avoiding the algal filament.
In the chloroplast, energy in sunlight is passed around different chlorophyll molecules until it reaches a specific chlorophyll molecule that can transfer energy in sunlight to an energized electron. This chlorophyll molecule is called the
A) reaction center. B) nucleus. C) accessory pigment. D) electron-carrier molecule. E) photoelectric point.
The higher similarity of the chimpanzee genome to humans compared to baboons or dogs is accounted for by what main concept.
A. Over time divergence has occurred forming genetic differences, some bigger than others. B. Species have become less diverse over time creating more mutations between species. C. Reduction in divergence means a closer relationship between some species. D. Some species share identical genomes where others are highly variable.
The position of a specific gene on a chromosome can be determined by:
a. preparing a karyotype. b. southern blotting. c. genomic hybridization. d. chromosome sorting. e. fluorescent in situ hybridization