The meiofauna of a sandy beach are organisms living on the surface of sediments
Indicate whether the statement is true or false
FALSE
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Split genes
A. are common in bacteria and eukaryotes. B. have introns located only at the beginning and end of a coding region. C. only have exons initially transcribed to mRNA. D. are acted upon by spliceosomes to excise introns and then join exons.
What is a karyotype?
A) A picture of all the chromosomes in one person's cell B) A list of all the genes on our chromosomes C) A complete sequence of our DNA D) A list of all the mutations in our chromosomes
If, when water froze, every water molecule formed a hydrogen bond with only one additional water molecule, which of the following would not happen?
a. Many aquatic organisms would not survive cold temperatures. b. Ice would likely sink to the bottom of lakes and rivers. c. Ice would be less dense than liquid water. d. Water molecules in ice would demonstrate a disorganized, non-lattice arrangement. e. Bodies of water would appear to freeze from the bottom up.
A gene can appear to move from one spot in the genome to another, a phenomenon called gene trafficking. How is this related to the death of a gene?
A. When a gene is copied to another part of the genome, the copy at the old location might "die" (disappear) B. When a gene moves to another part of the genome, it can't survive there so it "dies" (becomes a pseudogene) C. A deleterious gene might move to a different part of the genome so it does not "die" (undergo purifying selection)