Answer:
A. Scientists discovered chromosomes and DNA.
Explanation:
Mendel's ideas were based on patterns of inheritance in plants. Although he identified these patterns, at the time, we did not know what the hereditary material was. This means Mendel couldn't uncover the mechanism of why he was seeing the patterns he was.
When scientists discovered chromosomes and DNA, they were able to see how Mendel's observations made sense in the context of DNA and chromosomes.
I believe its your heart if I am not mistaken hope this helps ^^;
Answer:
I would think Channel proteins but I could be wrong
Answer:
Weathering is the breaking down of rock
Explanation:
Pls mark it as brainlest