Desiccation, a time-honored method of preserving food, is effective because the
A) heat of the process kills microbes.
B) freezing step of the process kills microbes.
C) salt concentration is too low to support metabolic function.
D) UV light used in the process of sun drying penetrates effectively.
E) water content is too low to support metabolic function.
E
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DNA replication occurs by adding ________
A) NTPs to the 5? end of the daughter strand B) dNTPs to the 5? end of the template strand C) NTPs to the 3? end of the daughter strand D) dNTPs to the 3? end of the template strand E) dNTPs to the 3? end of the daughter strand
If you were exposed to a sick animal that was found to have negri bodies in its nervous system in a postmortem examination, how would you be treated to prevent disease?
A) passive and active immunization against rabies B) antibiotics to treat Lyme disease C) antiviral medication D) observation to detect tick or lice bites
In the following list, pick the one that is NOT a source of genetic variability from meiosis and
fertilization.
a. recombination of homologous chromosomes b. segregation of chromosomes c. genes contained in the gametes that fuse to form a zygote d. recombination between sister chromatids e. physical arrangement of chromosomes along the metaphase plate in preparation for anaphase
During prophase I, each chiasma represents:
a. the remnants of the nuclear envelope. b. the remnant of the nucleolus. c. a newly formed haploid gamete. d. a site of crossing-over. e. the site where sister chromatids are connected.