Animals that can only be divided into mirror halves along one plane have
A. asymmetry.
B. radial symmetry.
C. bilateral symmetry.
D. acoeloms.
C. bilateral symmetry.
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Which of the following is the initiator codon?
A. UGA B. UAG C. AUG D. UAA
France is at almost the same latitude as Nova Scotia. Why is France's climate so much milder?
A) France is surrounded by mountains that buffer it from all severe weather conditions. B) Nova Scotia isn't near a large body of water, but France is located adjacent to the ocean. C) There are more people in France than Nova Scotia; thus human activity warms up the former region during colder periods of the year. D) The Gulf Stream brings warm water from the tropical Atlantic to France, modifying its climate.
Consider a human somatic cell in the G2 phase of the cell cycle. Which statement is true about the DNA molecules at this stage ?
A: Each chromosome consists of two identical DNA molecules joined at a centromere. B: The DNA molecules are not yet associated with histones (nucleosomes). C: The DNA molecules are part of highly condensed rod-like chromosomes. D: A and B. E: A and C.
Nucleotide analogs cause frameshift mutations
Indicate whether the statement is true or false