Which postulate of natural selection is best supported by the work of Gregor Mendel?
a. Some individuals fail to survive and reproduce.
b. Survival and reproduction are not determined by chance.
c. Individuals in a population vary.
d. Traits are passed from parent to offspring.
Ans: d. Traits are passed from parent to offspring.
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Modification enzymes typically methylate specific bases within the recognition sequence to prevent digestion of the nucleotide sequence by restriction endonucleases
Indicate whether the statement is true or false.
Which traits were originally used for classifying organisms into taxonomic categories?
a. morphology and behavior b. DNA and amino acid sequences c. physiology and biochemical pathways d. geography and ecology e. morphology and physiology
What is the major assumption of the exponential model of population growth?
a. resources are unlimited b. organisms selectively choose their mates c. the death rate equals the birth rate d. biotic potential is limited e. density-dependent factors are at work
Which of the following statements provides the best statement of a hypothesis?
A. I suspect that most people have the ability to identify cabbage by its smell. B. I know there is life on Mars. C. I think that there will be inventions that will allow greater amounts of food to be produced. D. I can sing better than you.