Which fish bones are homologous with an amphibian's front and hind limbs?
a. Tail, pectoral fin
b. Pectoral fin, pelvic fin
c. Pelvic fin, dorsal fin
d. Pectoral fin, dorsal fin
e. Gills, pelvic fin
b
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Every ________ of latitude is equivalent to ________ of time
a. 5 degrees; 1 hour b. 25 minutes; 1 hour c. 15 degrees; 1 hour d. 15 minutes; 1 hour
Which of the following is NOT evidence to support the endosymbiotic theory of the origin of mitochondria?
A. Mitochondria are produced from the host cell's DNA, which may have been derived when a segment of the engulfed cell's DNA was inserted into the host cell's genome. B. The mitochondrial ribosomes closely resemble bacterial ribosomes. C. Mitochondria are about the size of a proteobacterium. D. Mitochondria display a double membrane that is similar in structure to the plasma membrane of living cells.
What does H-O-H represent?
A) Ionic bonding of water B) Atom of water C) Mixture including water D) Molecule of water
Synthetic biologists are trying to create cells from raw material. One step in the process is encapsulating genetic material into a compartment. Researchers of the origin of life think that the earliest cells on Earth may have used RNA as their genetic material instead of DNA. As biologists consider which genetic material to use in creating their synthetic cells, which of the following characteristics of a single-stranded RNA genome should they keep in mind?
A. RNA is highly chemically stable relative to DNA. B. RNA cannot serve as a template. C. No enzymes can produce RNA. D. A newly synthesized RNA strand is not identical to the template strand.