In addition to visual comparison, which of the following would be the best way to determine that S. niagarae and S. yellowstonensis are separate species?
a. Look for the presence of chloroplasts
b. By the presence of a silica shell
c. By their location in different lakes
d. Compare their DNA sequences
e. Carbon date them
Answer: d. Compare their DNA sequences
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Which of the following is NOT true regarding bone repair?
A) immediately after breaking a bone, a hematoma forms as blood clots in the injured area B) Osteoblasts convert cartilage to bone in the injured area. C) a callus of fibrocartilage forms to hold the two broken ends of the bone together D) bones heal more quickly as an individual ages
The different versions of genes that code for hair color and length are examples of
__________.
a. alleles b. meiosis c. chromosomes d. gene flow
________ degrades mRNAs that contain premature stops
Fill in the blank with correct word.
The specificity of an antibody is due to
A) its valence. B) the H chains. C) the L chains. D) the constant portions of the H and L chains. E) the variable portions of the H and L chains.