__________ are aquatic heterotrophs and autotrophs with a cellulose covering. Fill in the blank(s) with the appropriate word(s)
ANSWER: Dinoflagellates
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Asexual reproduction occurs during _____
A) meiosis B) mitosis C) fertilization D) chromosome exchange between organisms of different species
If mRNAs could be ligated and replicated within plasmids, what enzyme commonly used in recombinant DNA technology would no longer be needed?
A) restriction enzymes B) DNA polymerase C) RNA polymerase D) reverse transcriptase E) Taq polymerase
Sperm pass through several stages during their development. The earliest stage in which the cell
becomes haploid is the:a. sperm. b. spermatid. c. primary spermatocyte. d. secondary spermatocyte. e. spermatogonium.
Choose the true statements about molecular clocks.
A. Ultimately, all molecular clocks depend on the rate of DNA mutation and DNA repair mechanisms. B. The rate of a molecular clock for a given DNA character might vary depending on how constrained the character is by natural selection. C. Molecular clocks can be calibrated using fossil evidence. D. All molecular clocks tick at the same rate.