Once labor begins in childbirth, contractions increase in intensity and frequency, causing more contractions to occur until delivery. The increasing labor contractions of childbirth are an example of which type of regulation?
A) positive feedback
B) negative feedback
C) feedback inhibition
D) enzymatic catalysis
A
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Primers are used in both PCR and in DNA sequencing. What is the purpose of the primers?
A. to separate the DNA template strands. B. to provide a 3'- OH for DNA polymerase to build a new DNA strand. C. to terminate synthesis of the growing DNA strand. D. to separate various-sized DNA products. E. to add nucleotides to a growing DNA strand.
Maintenance of the body's internal environment at relatively constant levels is called ____
a. feedback b. homeostasis c. physiology d. natural selection e. feedforward
A population's ____ occurs under ideal, unrealistic conditions
a. per capita growth rate b. per capita population curve c. intrinsic rate of increase d. geometric population curve e. exponential population curve
Seeds require ________ for germination to occur.
A. adequate warmth B. oxygen for increased metabolism C. adequate water D. All of the choices are required.