A three-nucleotide sequence in MRNA that specifies a particular amino acid or polypeptide termination signal; The basic unit of the genetic code
What will be an ideal response?
Codon
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Which of the following is NOT associated with meiosis?
a. reduction of the number of chromosomes b. somatic cells c. sexual reproduction d. sperm and egg e. germ cells
The Carboniferous Period is extremely significant to our current society because
A. mammals diversified. B. human evolution began in the period. C. plants and animals first adapted to a terrestrial environment during this period. D. the Carboniferous forests turned into the coal that fuels modern society.
According to MacArthur and Wilson's hypothesis of island biogeography, species immigration and extinction rates on a particular island correlate to:
a. the island's size and distance from the mainland b. the island's stage of ecological succession c. the number of other islands in their archipelago d. how the island formed
Which of the following statements regarding toxoids is FALSE?
A) They are produced against the toxin of the microorganism rather than the microorganism itself. B) They provide lifelong immunity. C) They stimulate antibody immune responses. D) They have few antigenic determinants. E) They are chemically or thermally modified.