Which of the following factors likely contributed to the accumulation of O2 within Earth's atmosphere?
A. the evolution of cyanobacteria
B. the fact that oxygen is also cycled during
the carbon cycle
C. the fact that there is a slight "de-coupling"
between photosynthesis and respiration
D. the fact that photosynthesis releases O2
as a product
E. All of these answer options are correct.
E
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Which of the following is/are TRUE
What will be an ideal response?
Which of the following is not a similarity supporting the endosymbiont theory?
A. similarity in the DNA of mitochondria and prokaryotes B. similarity in the nucleus of prokaryotes and mitochondria C. similarity in the RNA of mitochondria and prokaryotes D. similarity in the ribosomes of mitochondria and prokaryotes E. All answers support the endosymbiont theory.
The following steps occur during bacteriophage replication. What is the second step?
a. Penetration b. Biosynthesis c. Attachment d. Lysis