What are selective media, differential media, and enriched media? When are they used?
What will be an ideal response?
Ans: contains dyes or toxics substances which inhibit the growth of certain microbes, but support the growth of others
Differential media: distinguishes between different types of microorganisms based on differences in appearance of growth or color changes. EMB is selective and differential because bacteria that ferment lactose produce dark purple colonies or a metallic green sheen on the media.
Enriched media: media supplemented by blood or other special nutrients (eg blood agar) to allow growth of organisms that cannot grow on general purpose media.
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The genome of retroviruses is made of
A. ssDNA. B. dsDNA. C. ssRNA. D. dsRNA.
A plant that you are studying has sluggish wound healing abilities as well as an inability to store significant food reserves. You would like to enhance these properties. If you could enhance the growth of a tissue to improve these properties, which tissue would you enhance?
A. Parenchyma of the stem cortex. B. Root apical meristem. C. Periderm. D. Lateral meristem.
On Pacific coasts, the population of mussels is kept in check by predation from:
a. sea otters. b. sea stars. c. sea urchins. d. barnacles. e. supralittoral isopods.
what is CMV?
What will be an ideal response?