You modify one species of rhizobia (Species A) to express flavonoid receptors and Nod factors from another species of rhizobia (Species B). This modified rhizobia is likely to:
A. form a symbiosis with the plant with which species A normally forms a symbiosis.
B. be unable to bind flavonoids.
C. be unable to fix nitrogen.
D. form a symbiosis with the plant with which species B normally forms a symbiosis.
D. form a symbiosis with the plant with which species B normally forms a symbiosis.
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A decreased risk of epigenetic imprinting disorders, such as Beckwith-Wiedemann syndrome, is observed in children
conceived following ART. a. True b. False
In the experiments of Griffith, the conversion of nonlethal R-strain bacteria to lethal S-strain bacteria:a
was the result of genetic mutation. b. was an example of the genetic exchange known as transformation. c. supported the case for proteins as the genetic material. d. could not be reproduced by other researchers. e. was an example of conjugation.
Low body temperature triggers adaptive responses to conserve heat. Once the integrating center detects that body temperature has risen, it will decrease these responses. What does this exemplify?
A. adaptation B. negative feedback C. acclimatization D. positive feedback
Four of these statements are true about mitochondria. Which one is not true?
A. They have DNA. B. Their DNA can experience mutations. C. In animals, the mitochondria come from the mother. D. They undergo genetic recombination during fertilization. E. Their DNA can be used as molecular clock.