In the preceding experiment, bacteria that form blue colonies on X-gal/IPTG LB agar containing antibiotic also contain
(a) a gene for antibiotic resistance.
(b) an active lacZ gene.
(c) an inactive lacZ gene.
(d) both a and b.
(d) both a and b.
Biology & Microbiology
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A fertilized, diploid egg is called a ____
Fill in the blank with the appropriate word.
Biology & Microbiology
What is the vulva?
What will be an ideal response?
Biology & Microbiology
A collection of host cells that house cloned fragments representing expressed genes is (a) ____
a. cDNA library. b. transcribed library. c. genomic library. d. RNA library. e. plasmid library.
Biology & Microbiology
Why are gymnosperms considered to be "naked seed" plants?
A) Their seeds have a thin layer of endosperm. B) They do not produce seeds; they produce only spores. C) Their seeds are not enclosed within ovaries. D) Their seeds develop on the surface of sporophytes.
Biology & Microbiology