The Panama Canal was completed in 1914, and its depth is about fifty feet. After 1914, snapping shrimp species from which habitats should be most likely to form hybrids as the result of the canal?
A) A5 and B5
B) A3 and B3
C) A1 and B1
D) A1-A3 and B1-B3 have equal likelihoods of harboring snapping shrimp species that can hybridize.
C
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Ribosomes can attach to prokaryotic messenger RNA _____
A) once post-transcriptional modification is complete B) before transcription is complete C) once replication is complete D) once the primary transcript has been released from RNA polymerase
A young graduate student is trying to identify new species of bacteria based on the criteria of Ernst Mayr
She is having a lot of trouble with this method, and then suddenly realizes that she can't use Mayr's definition of a species when it comes to bacteria. Why? (Select all correct choices.) A. DNA can be passed between bacteria of different species via horizontal gene transfer. B. DNA is never passed between bacteria of different species. C. Bacteria do not reproduce sexually and/or do not undergo meiosis. D. Bacteria form pili and, as a result, reproduce sexually.
One strand of DNA serves as a template for the synthesis of another so that __________.
A. the progeny of each cellular replication gets the same genetic information B. there are two copies of each gene on a single DNA molecule C. DNA can serve as a template for the synthesis of other polymers D. the helical shape of DNA is conserved
Food vacuoles and phagocytic vacuoles are most similar to ________.
A. Golgi apparatus B. mitochondria C. chloroplasts D. lysosomes