An external structure unique to the archaea is a(an)
A. cilium
B. flagellum
C. fimbria
D. hamus
E. pilus
Answer: D
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A polysome is
a. the combination of a large and a small ribosome subunit. b. the complex where mRNA splicing occurs. c. the assembly at a promoter at the start of transcription. d. an mRNA with multiple ribosomes attached. e. the complex that puts a poly(A) tail on an mRNA.
Which phase is marked by the arrival of chromosomes at the poles?
If there is life on another planet within our galaxy, why would we expect to learn that this life would probably use the same narrow range of wavelengths of the electromagnetic spectrum as we do for a source of energy and information?
a. because all life must use the same electromagnetic spectrum by definition b. because of the fundamental aspects of photon energy and light absorption c. because this is the same wavelength that hits the Earth d. because there is no other wavelength available in nature
Homo habilis differed from australopithecines in terms of
A. brain volume. B. longer arm length than leg length. C. stature. D. skeletal structure.