The FIRST self-replicating systems likely contained which molecule(s) as a central component?
a. polysaccharides
b. DNA
c. RNA
d. protein
Answer: C
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This atom in its unbound state has four valence electrons. These electrons readily form single, double, and even triple bonds among themselves to become stable. This atom is:
A. carbon. B. hydrogen. C. oxygen. D. nitrogen. E. phosphorus.
Secondary succession is likely to occur ____
a. in a newly formed volcanic island b. in an abandoned field c. in a mature forest d. on land exposure by glacier retreat e. on land with little to no soil
In his experiments, Griffith found that transformation occurs naturally in bacteria. Explain how Griffith found this out.
What will be an ideal response?
A dish of cells is treated with centrinone, a centriole inhibitor. These cells would no longer be able to ________.
A. make ATP B. divide C. synthesize proteins D. conduct photosynthesis E. produce lysosomes