A ________ is a sperm-killing chemical that is more effective as a contraceptive when used in combination with a condom or diaphragm
Fill in the blank(s) with correct word
spermicide
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In higher animals, including humans, meiosis results in the production of
(a) egg cells (ova). (b) gametes. (c) sperm cells. (d) all of the above.
The Hin recombinase of Salmonella typhimurium will function under which of the following conditions?
A. Only when the hix sequences are on the same supercoiled DNA molecule. B. Only when the hix sequences are oriented in the same direction relative to each other. C. Only when the Hin recombinase accessory proteins have dissociated will recombinase activity occur. D. Only when an enhancer sequence is present on a different chromosome than the hix sequences. E. All of the choices given are correct.
If an Arabidopsis plant does not express homeotic genes during flower development
A. the plant will only develop to the heart stage. B. the plant will not develop cotyledons. C. the plant will develop leaves instead of flowers. D. the plant will develop flowers instead of leaves. E. the plant will die.
Please choose the microbial control method that neither inhibits nor kills microbes, but instead physically removes them from liquids or air.
A) Cold sterilization B) Lyophilization C) Filtration D) Desiccation E) Irradiation