Induction refers to
A) hormones from the mother's blood altering the development of the embryo.
B) the formation of the nervous system.
C) chemical messengers from one embryonic cell influencing the development of other cells.
D) the migration of cells to form the gastrula.
E) the formation of the mesoderm layer in a gastrula.
C
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A linear stretch of DNA that specifies the sequence of amino acids in a polypeptide is called a(n)
a. codon. b. intron. c. messenger. d. gene. e. enzyme.
The human population is expected to double in about ________ years.
A. 60 B. 15 C. 25 D. 91
Our genetic information will be decided based on the order of nucleotides (G,C,A,T,) in our DNA.
a. true b. false
Jess has A- blood type, has never received a blood transfusion, and never been pregnant. Antibodies against what blood antigens could be present in Jess' blood?
A. O and Rh antigens B. B antigens C. A antigens D. B and Rh antigens E. O antigens