In a single strand of DNA, nucleotides are connected by which type of bond?
A. hydrogen.
B. peptide.
C. phosphodiester.
D. purine.
E. ionic.
C. phosphodiester.
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How do altruistic behaviors arise through natural selection?
A) By his/her actions, the altruist increases the likelihood that some of its genes will be passed on to the next generation. B) The altruist is appreciated by other members of the population because its survivability has been enhanced by virtue of its risky behavior. C) Animals that perform altruistic acts are allowed by their population to breed more, thereby passing on their behavior genes to future generations. D) Altruistic behaviors lower stress in populations, which increases the survivability of all the members of the population.
Rickettsial disease detection/identification includes which of the following?
A) latex bead agglutination assays B) ELISA C) PCR assays D) latex bead agglutination assays, ELISA, and PCR assays
If two copies of a gene are different alleles, the condition is referred to as ____
a. homozygous b. hybrid c. heterozygous d. codominant e. dominant
Claviceps purpurea produces a(n) __________, which infests grain and has been important in many
historical events, as ingestion of infested grain milled into flour can cause hallucinations and even death. a. ergot b. smut c. rust d. brown rot e. mildew