Because people throws trash into rivers and stuff and they flow down into the ocean and makes it unclean
Answer: a and b
Explanation: i think this is the answer i hop this is helful
Answer:
A). Chromosomal mutation.
Explanation:
If this is wrong then it is trisomy.
cell is the basic unit of life and it is the smallest unit of life also
many cells combine to form tissue and tissue combine to form organs
atom is the smallest unit of matter everything is made up of small units called atoms
Other times, species remain stable for long periods, showing little or no evolutionary change. However, the characteristics of organisms that reproduce every few hours, such as bacteria, can potentially evolve much faster than in organisms with generations that are measured in months or years, such as horses.
