Which of the following processes contributes least to genetic diversity?
A) crossing over
B) duplication of DNA
C) independent assortment of chromosomes at the metaphase plate
D) combining of gametes from two different individuals
Answer: B
Biology & Microbiology
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What biogeochemical cycles have been heavily affected by human activities? Check all that apply.
_____ the water cycle _____ the phosphorus cycle _____ the nitrogen cycle _____ the carbon cycle
Biology & Microbiology
A DNA barcode system uses a nuclear gene that varies greatly between species
Indicate whether the statement is true or false.
Biology & Microbiology
Alcohol acts predominantly as a(n)
a. stimulant. b. analgesic. c. hallucinogen. d. depressant. e. anesthetic.
Biology & Microbiology
How do oxygen molecules travel through a cell membrane?
A) diffusion B) active transport C) carrier proteins D) endocytosis
Biology & Microbiology