What is the most commonly employed form of birth control in the United States?
A. sperm blockage with condoms
B. prevention of ovulation by hormonal inhibition
C. abstinence
D. sterilization
E. prevention of embryo implantation with IUD
Answer: A
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If more than one codon specifies the same amino acid, the code is said to be
A) complementary. B) inverse. C) redundant. D) ambiguous. E) degenerate.
Thomas Malthus proposed that
a. species gradually improved over generations because of an inherent drive toward perfection b. humans reproduce beyond the capacity of their environment to sustain them. c. the food supply and populations multiplied at the same rate. d. artificial selection was the key to evolution. e. natural selection was the key to evolution.
If two genes have a lod score of 1.2, this indicates that they are most likely_____
a. disease causing genesb. linked on an autosome c. X-linked d. on separate chromosomes e. in separate genomes
Precipitation can be a significant input of nutrients in ecosystems
Indicate whether the statement is true or false