The atomic number is determined by the number of ____
a. protons
b. neutrons
c. electrons
d. protons plus neutrons
e. protons plus electrons
ANSWER: a
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Which of the following is the first stage in reproduction and development?
a. cleavage b. gamete formation c. gastrula formation d. zygote formation e. blastula formation
If long or round are homozygous forms of an
incompletely dominant gene, and oval is the phenotype of the heterozygote, give the F2 ratio of the cross between long and round (both genotype and phenotype). What will be an ideal response?
Explain how IS elements produce target-site duplications when they move
What will be an ideal response?
Cancer is a disease caused by mutations. Yet in most instances if one of your parents tragically died from cancer, this does not put you at greater risk than a person whose parents do not develop cancer. How can cancer be caused by mutations and yet not
be heritable? A) Most cancers arise from mutations in germ-line cells. B) Cancer-causing mutations are repaired in offspring but not in parents. C) Most cancers arise from mutations in somatic cells. D) The mutations that cause cancer are special and cannot be passed on regardless of what type of cell they occur in.