Which of the following is(are) true about the DNA of a zebrafish that glows in the dark
because its DNA contains and expresses the firefly gene for bioluminescence?
a. It has recombinant DNA.
b. Its DNA has mutated.
c. It has evolved.
d. The DNA contains a bacterial plasmid.
A
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What is the total magnification when using the high-power (high-dry) objective of a compound light microscope equipped with a × 10 ocular lens?
A) 40 B) 50 C) 100 D) 400
Cells are largely constructed from four classes of large molecules called ____________________
Fill in the blank(s) with correct word
Which of the following is not a reason why two children born to the same parents [not identical twins] are unlikely to have the same genetic makeup?
A) Crossing over recombines portions of sister chromatids. B) Fertilization provides a new pairing of chromosomes. C) Each sperm or egg has a random assortment of chromosomes, half from each pair. D) Chromosomes align themselves independently during meiosis I. E) Since though they are produced at different times, all sperm will be genetically different from all other sperm.
Which of the following is NOT a predisposing factor of disease?
A) lifestyle B) genetic background C) climate D) occupation E) All of these are predisposing factors of disease.