Which of the following choices best describes the earliest cells?
a. aerobic heterotrophic eukaryotes
b. anaerobic prokaryotes
c. heat-resistant Archaea
d. photosynthetic marine eukaryotes
b
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The chromosome must be ___________ in order to fit into the bacterial cell.
A. supercoiled by topoisomerases B. supercoiled around histone proteins C. organized into loop domains by topiosomerases D. compacted into a nucleosome E. both organized into loop domains and supercoiled by topoisomerases
Essential plant nutrients include carbon, potassium, calcium, and nitrogen.
Answer the following statement true (T) or false (F)
According to the Centers for Disease Control and Prevention, what percent of the population needs to be vaccinated?
a. 50 b. 60 c. 70 d. 80
What is the adaptation hypothesis?
A) The phage mutates so it can't infect bacteria any longer. B) The phage stimulates the bacteria to mutate to become immune to the phage. C) The phage and bacteria both mutate so the phage becomes less virulent. D) The phage mutates to infect bacteria more effectively. E) The bacteria will mutate so it can become an auxotroph.