What is the most commonly employed form of birth control in the United States?
A. Sperm blockage with condoms
B. Prevention of embryo implantation with IUD
C. Prevention of ovulation by hormonal inhibition
D. Abstinence
E. Sterilization
Answer: A
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Which of the following is correct regarding natural selection?
A. It is based on competition for resources B. Beneficial traits are passed on to the next generation C. It enables a species to become better adapted to its environment D. It may drastically change a species over time E. All of the answers are correct
The ________ gland lies in the center of the brain and contains secretory cells that produce melatonin
Fill in the blank(s) with correct word
Why is it more likely that coincidental homologies (i.e., similarities that are just by chance) are statistically more likely to occur with DNA than protein comparisons between species?
What will be an ideal response?
Nisin
A. is a food additive that blocks the growth of some gram positive bacteria. B. is a small amphiphilic peptide that disrupts membrane integrity and function. C. is a bacteriocin produced by some strains of Lactococcus lactis. D. All of the choices are correct.