How are root nodule and arbuscular mycorrhizal symbioses similar?
A) They both use lipochitin oligosaccharide signaling factors to initiate root colonization.
B) They both supply nitrogen to the host plant through nitrogen fixation.
C) They both increase absorption of nutrients from soil.
D) They are both required for the growth and reproduction of their host plants.
Answer: A
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. Which cell feature is absent in bacterial cells?
a. plasma membrane b. nucleoid c. cytoplasm d. nucleus e. DNA
Which of these is the localized site for the majority of the DNA in the cell?
a. ribosomes b. Golgi body c. nucleus d. mitochondria e. vesicles
Comparative genome studies show that humans and chimpanzees shared a common ancestor
approximately ____________ million years ago. Fill in the blank(s) with the appropriate word(s).
Osama Shimomura, Martin Chalfie, and Roger Tsien won the Nobel Prize for Chemistry for their discovery and development of ________
A) RT-PCR B) PCR C) a novel DNA sequencing method D) GFP E) RFLPs