Studies performed on identical twins separated at birth have shown that many phenotypes, such as IQ or alcoholism, are influenced by the person's genotype as well as by their environment
Indicate whether the statement is true or false
TRUE
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Which of the following is NOT a human blood type?
A) ABO- B) A+ C) B- D) AB+ E) O-
The structure of DNA and RNA are similar in that
(A) both molecules are made of the same 5-carbon sugar (B) both molecules are composed of the same 4 nitrogenous base (C) the nucleotides of both molecules contain a phosphate group (D) both molecules are double stranded which are antiparallel in directionality
The extensive natural pine forests of the southern Atlantic and Gulf Coasts of the United States are maintained by:
A) grazing. B) frequent logging. C) occasional hurricanes. D) periodic fires.
Blocking potassium ion channels in a mammalian cell membrane would __________.
A) decrease the magnitude of the membrane potential B) increase the magnitude of the membrane potential C) increase the resting potential D) decrease sodium's equilibrium potential E) increase potassium's equilibrium potential