When a planarium is cut in half, a head will regenerate from the wounded anterior end and a tail will regenerate from the wounded posterior end. This is an example of
A. conditional specification.
B. autonomous specification.
C. fate mapping.
D. Spemann's organizer.
E. transforming growth factor.
A. conditional specification.
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The phrase "Study nature, not books" is attributed to:
a. Louis Agassiz. b. Alexander Agassiz. c. Charles Darwin. d. Charles Wyville Thomson. e. Aristotle.
A slimy layer of bacteria coating a surface is also known as
a. prokaryocommune b. bioaggregate c. tissue d. biofilm e. plague
Which of the following implies movement with regard for direction?
A. Taxis only B. Kinesis only C. Migration only D. Taxis and migration only E. Taxis, migration, and kinesis
Comparisons of human and mouse genomes reveals
A. they have very little in common. B. the genomes are very similar, with most of the genes unique to mice linked to smell and reproduction. C. they have widely different numbers of genes, and share only a few more genes than humans and pufferfish. D. the differences between humans and mice are mainly the introns. E. the genomes are very similar, with most of the genes unique to mice linked to size and shape.