That would be peptide bonds
C because oxygen was a byproduct of photosynthesis and proved to be EXTREMELY important in the atmosphere.
Answer:
Sooo.. because i am like superrr smart (not really) i think its C :)
Answer:
a.
Explanation:
pathogens may enter the body and cause illness.
The chromatids are made of a substance called chromatin. This is a single, very long strand of DNA. ... The chromatin is copied, so you now have 92 strands, that are each spiraled up to form the chromatids. The 2 copies of each chromatid are joined together by a centromere to form a chromosome.
