Homologous genes within a species are called paralogs
Indicate whether the statement is true or false
TRUE
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Production of semisynthetic penicillins involves chemical modification of a penicillin product after it has been released from penicillin-producing cells.
Answer the following statement true (T) or false (F)
During the adaptive radiation of jawed fishes 400 million years ago, most cephalopods ________
a. lost their external shell and became active, quick, and relatively intelligent b. evolved thicker, heavier shells requiring a sessile lifestyle c. became herbivores, subsisting on algae and ocean plants d. became extinct
Which is the correct sequence in the evolution of
plants? a. algae >>> gymnosperms >>> angiosperms>>> bryophytes >>> ferns b. ferns >>> algae >>> bryophytes >>> gymnosperms>>> angiosperms c. algae >>> bryophytes >>> ferns >>> gymnosperms>>> angiosperms d. ferns >>> gymnosperms>>> algae >>> bryophytes >>> angiosperms e. algae >>> bryophytes >>> ferns >>> angiosperms >>> gymnosperms
In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.What would be the results of a test cross with the F1 flies?
A. 1 brown eye, thin wing veins: 1 red eye, heavy wing veins B. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 red eye, thin wing veins C. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins D. 1 brown eye, heavy wing veins: 1 red eye, thin wing veins