A covalent bond occurs when ________.
a. protons are transferred from one atom to another
b. neutrons are shared between two atoms to form an isotope
c. electrons are shared between two atoms to complete their octets
d. electrons are transferred from one atom to another
Ans: c. electrons are shared between two atoms to complete their octets
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Bacterial symbionts of termite hindguts play a critical role in the termite's
A) reproduction. B) nitrogen metabolism. C) resistance to fungal infection. D) reproduction and nitrogen metabolism.
In DNA replication, primase is responsible for:
A. removal of a terminal nucleotide in a polynucleotide chain. B. connecting two fragments of DNA together. C. cutting DNA at a site?specific sequence. D. producing Okazaki fragments. E. synthesizing an RNA primer for DNA synthesis.
In 2007, research confirmed the existence of hormones that control the timing of flowering. These hormones are called
A) abscisic acids. B) florigens. C) cytokinins. D) auxins. E) ethylenes.
If a woman were exposed to a chemical that caused the cilia in her reproductive system to stop moving, what specifically is likely to happen?
A) Spontaneous abortions would occur. B) Ova could no longer pass through oviducts. C) She would no longer be able to ovulate, and early menopause would occur. D) She would have many ovarian cysts.