________ are the group of microorganisms composed only of hereditary material wrapped in a protein covering.
Fill in the blank(s) with the appropriate word(s).
Viruses
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Which important discovery in the early 1900s enhanced food production, thus increasing human population growth?
a. cultivation of rice b. cultivation of wheat c. the wheel d. synthetic fertilizer e. penicillin
In genomic libraries:
a. naturally and arti?cially selected plants are genetically engineered. b. DNA fragments are stored in plasmids. c. a virus is used to transform human cells. d. none of the above are done.
Rosalind Franklin’s research contribution was
essential in a. establishing the chemical composition of DNA. b. establishing the principle of base pairing. c. establishing the principal dimensions of the DNA molecule. d. determining the sequence of nucleotides in DNA. e. determining the covalent bonding angles within DNA nucleotides.
Deliberate infection of young children with particles of ground smallpox scabs from children who had survived mild cases of smallpox was known as (vaccination/variolation/immunization)
What will be an ideal response?