Leader sequences contain signals that:a
prevent enzymes from degrading the newly synthesized mRNA.
b. inhibit ribosome binding until the appropriate time.
c. initiate chain termination.
d. allow the ribosomes to be properly positioned for translation of mRNA molecules.
e. allow tRNA molecules to successfully bind to mRNA.
d
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If plants did not produce vascular tissue they would be limited to a few millimeters in height
A. true B. false
A community is defined by populations of which of the following groups?
a. conspecifics b. symbiospecifics c. heterospecifics d. paraspecifics
Unlike angiosperms, gymnosperms like pines have single instead of double fertilization, but otherwise have an identical life cycle. What structure should have the greatest difference between angiosperms and gymnosperms?
A) egg cell B) seedling C) seed D) leaf cell
Bacterial plasmids
A. are essential for chromosome replication and binary fission. B. are artificially created by humans and are present in bacteria only because humans put them there. C. can provide genes that allow the bacteria to grow and thrive in the presence of potential toxins. D. are essential for growth. E. are essential for cellular respiration.