The ______________________ are cells which form bone.
a. Osteoclasts
b. Osteoblasts
c. Chondrocytes
d. Chief cells
Ans: b. Osteoblasts
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In DNA, most satellite sequences are found in
A) chromosome arms. B) telomeres. C) centromeres. D) spaces around the dark bands.
The relatively short-term changes in allele frequencies within a species or population is
A. neither preserves nor rejects harmful variations in a population. B. preserves harmful variations and rejects favorable variations in a population. C. preserves favorable and harmful variations in a population. D. preserves favorable variations and rejects harmful variations in a population.
Which of the following choices does NOT correctly categorize the biological kingdom with the form of reproduction used by the organisms within it?
a. Protista: sexual reproduction, asexual reproduction, and conjugation b. Archaea: asexual reproduction only c. Animalia: both sexual and asexual reproduction d. Bacteria: asexual reproduction only e. Fungi: asexual reproduction only
Lampreys differ from fishes in that lampreys
A) lack a backbone. B) lack an endoskeleton. C) lack jaws. D) possess a backbone and skull.