Which of the following would NOT be part of the germ tube?
A. tube cell nucleus
B. two sperm cells
C. pollen sporopollenin wall
D. pectin precursors
E. cell membrane
C. pollen sporopollenin wall
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You have learned that having linear DNA has consequences, the major one being that the DNA gets shortened every time it replicates, something that does not happen with the circular DNA found in prokaryotes
What, then, is the advantage of having linear DNA? A. Linear DNA is easier to package than circular DNA. B. Linear DNA is less susceptible to viruses than circular DNA. C. Since mitochondria and chloroplasts have circular DNA, nuclear DNA had to be linear. D. Replication can begin from multiple sites on a linear DNA, allowing for rapid replication and relieving the evolutionary pressure for a streamlined genome. E. All of the answer options are correct.
The tissue that regrows a leaf from its base is the
A. intercalary meristem. B. lateral meristem. C. vascular bundle. D. apical meristem. E. tracheid.
In addition to visual comparison, which of the following would be the best way to determine that S. niagarae and S. yellowstonensis are separate species?
a. Look for the presence of chloroplasts b. By the presence of a silica shell c. By their location in different lakes d. Compare their DNA sequences e. Carbon date them
What happens to the protons received from NADH in bacteria?