Most digestion and the major site of absorpation is in the
A. cecum
B. colon
C. small intestine
D. large intestin
Answer: C. small intestine
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An example of a mineral known as a micronutrient that may be toxic to plants is:
A. aluminum B. cadmium C. chromium D. lead E. all of the choices
What agricultural practice encourages the rapid
spread of plant diseases?
a. irrigation practices b. use of herbicide sprays c. genetic modification of crops d. planting large areas with a single variety e. use of pesticides
In a human cell, there are _____after DNA replicates during S phase
a. 92 chromosomes and 46 pairs of sister chromatids b. 46 chromosomes and 23 pairs of sister chromatids c. 23 chromosomes and 23 pairs of sister chromatids d. 92 chromosomes and 23 pairs of sister chromatids e. 40 chromosomes and 20 pairs of sister chromatids
A group of people whose ancestors immigrated to North America 200 years ago have certain allele frequencies that differ significantly from those in surrounding populations in the United States. Which of the following is the most likely explanation for the difference in allele frequencies?
(A) Mutation (B) Independent assortment (C) Reproductive isolation (D) Sex linkage