What are the benefits of maintaining biodiversity?
What will be an ideal response?
Genetic diversity is helpful for crossbreeding and genetic engineering; plants may serve as sources of new medicines for people; biodiversity promotes healthy ecosystems by cleaning the air and water, pollinating crops, building soil, and recycling nutrients.
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What does physical mapping provide that the other types of genetic mapping do not?
A. Recombination distances between genes B. Number of nucleotide base-pairs between genes C. Relationship of the gene to specific chromosomal banding patterns
Evolution at the genomic level involves changes in
A. chromosome structure and number. B. sequences of amino acids in proteins. C. sequences of nucleotides in RNA molecules. D. incorporation of new organelles such as the mitochondrion. E. DNA and histone relationships.
In a resting person what percentage of blood pumped by the right ventricle enters the lungs?
a. 0 percent b. 10 percent c. 20 percent d. 50 percent e. 100 percent
Which of the following is not true concerning the large intestine?
a. It is also called the colon. b. It harbors beneficial bacteria. c. It is involved with the absorption of sodium. d. It is involved with the absorption of water. e. It secretes digestive enzymes.