James Watson, Francis Crick, Rosalind Franklin, and Maurice Wilkins are recognized for their contributions to the
discovery of the ____.
a. presence of nuclein (DNA) in white blood cells
b. role of DNA in cells
c. chemical components of DNA
d. three-dimensional structure of DNA
e. location of DNA in cells
ANSWER: d
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If all of the variation in a trait in the population is due to differing genotypes, then the mean phenotype of the offspring would be identical to the parental mean
A. true B. false
The major source of diversity for B and T cell receptors is____
a. mitosis b. meiosis c. transcript processing d. random recombination of gene segments e. mutation
The pH of seawater is important to living organisms because:
a. it can affect the functioning of enzymes. b. it can interfere with metabolism. c. it can affect growth. d. All the above.
Farmers often spray spores of which bacterial species that make a protein toxic only to some insect larvae?
A. Aspergillus niger B. Proteobacteria C. Verticillium D. Agrobacterium tumefaciens E. Bacillus thuringiensis