Bacteria have an average generation time of 24 hours.
Answer the following statement true (T) or false (F)
False
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Lignified, tube-like structures that branch throughout the body of some plants, conducting water and solutes, are called
____.
a. vascular tissues b. apical meristems c. root systems d. rhizomes e. shoot systems
The ____ of the plant refers to the structure and arrangement of its internal parts
a. morphology b. ecology c. anatomy d. distribution e. physiology
One strain of rII- phage has a deletion in the rII region, another has a point mutation in the rII region. When E. coli K(?) cells are infected with either rII- phage (not both) no plaques form. When E. coli K(?) cells are infected with both rII- phage simultaneously plaques do form. Why do plaques form when E. coli K(?) cells are infected with both types of rII- phage simultaneously?
A) Recombination between the two phage genomes resulted in a wild-type phage. B) The two phage have mutations in different rII genes and their genomes complement each other. C) A protein made by the deletion phage can repair the DNA of the phage with the point mutation. D) Bacteria can survive infection with one phage, but they cannot survive infection with two phages.
Which of the following statements regarding the Watson–Crick model of DNA is false?
A) It is the most common biological form of DNA. B) The two DNA strands form a left-handed helix. C) The two DNA strands are antiparallel. D) The bases are "stacked" in the center of the molecule. E) The backbone consists of alternating sugars and phosphates.