The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
I knew this at one point but I forgot it
Answer:
Plant cells have cell walls, constructed outside the cell membrane and composed of cellulose, hemicelluloses, and pectin, a cell membrane similar to that of the animal cell, a large central vacuole, a water-filled volume enclosed by a membrane known as the tonoplast, they contain plastids, the most notable being chloroplasts, which contain the green-colored pigment chlorophyll that converts the energy of sunlight into chemical energy, and then all the other organelles of the animal cell (mitochondria, endoplasmic reticulum, nucleus and nucleolus, golgi apparatus, etc.)
The term which describes any relationship in which two species live closely together is called SYMBIOSIS.
The third option, destroying cells
