The union of a sperm and egg is called
A. implantation.
B. cleavage.
C. fertilization.
D. mitosis.
C. fertilization.
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The traditional kingdom Monera is now divided into two domains, Archaea and Bacteria
a. True b. False
Which of the following is NOT an adaptation of plants to a terrestrial environment?
A. a cuticle to prevent water loss from exposed parts of the plant B. a dominant sporophyte with vascular tissue C. the evolution of photosynthesis in order to supply the energy necessary to live on land D. stomata to regulate gas exchange with the atmosphere
Which enzyme performs the DNA unwinding function during transcription elongation?
a. DNA helicase b. DNA ligase c. topoisomerase d. RNA polymerase
In Griffith's transformation experiments,
A) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice. B) the S form lacked an enzyme involved in the manufacture of the polysaccharide coat, leading to the abnormally smooth colonies. C) mice infected with live R form caused pneumonia and death in mice. D) the R form transformed the S form into a virulent variety of the bacteria.