Mitosis results in perfect duplication of cells. Meiosis results in a shift from ________ to _________.
Fill in the blank(s) with the appropriate word(s).
Ans: diploid, haploid
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Which of the following play a role in the diagnosis of syphilis?
A. Dark-field examination of lesion fluids B. Clinical history C. Immunofluorescence examination of lesion fluids D. All of the choices are correct.
It is generally thought that animals have undergone four major physiological and anatomical innovations during their evolution. These are (in no particular order)
a. multicellularity, bilateral symmetry, origin of patterns of embryonic development, development of tissues. b. development of the versatile forelimb, multicellularity, origin of patterns of embryonic development, development of tissues. c. development of tissues, photosynthesis, bilateral symmetry, multicellularity. d. bilateral symmetry, development of tissues, origin of the multichambered heart, origin of patterns of embryonic development. e. origin of patterns of embryonic development, development of the versatile forelimb, origin of the multichambered heart, multicellularity.
Which of the following is NOT used by bacteria for attachment to a host?
a. M protein b. Ligands c. Fimbriae d. Capsules e. A-B toxin
Which of the following genetic changes would NOT be passed from parent to child?
a. a mutation in a skin cell b. the loss of a chromosome in a sperm cell c. the addition of a chromosome in an egg cell d. a translocation in a gamete