Answer:
Predation is when an interaction in which one organism captures and feeds on another organism.
The structure in cells that contains DNA and protein is the nucleosome, found in the nucleus. In the nucleus of the cell, DNA is exists in the form of a long helical thread. It order to fit inside the nucleus, the DNA thread must be compressed enough to do so.
The cell accomplishes this by wrapping the DNA thread around a protein called histone. A single unit of DNA and histone octamer (called octamer because it consists of 8 proteins) is called a nucleosome.
The entire stretch of DNA in an average human cell is about 2 meters in length and would never fit inside a cell if not for histone proteins.
Answer: A
Explanation: The lower pH is higher acidity, and 3 is the lowest so it is the most acidic.
Natural selection is what makes evolution occur, it is one major cause of evolution. Certain species survive and die due to natural selection. The strongest and most evolved will survive vs the weak and not evolved species. Species have to adapt to their environment and natural selection is constantly causing species to keep evolving over time.