Only plants need cell walls, animals do not. Cell walls help maintain cell shape in plants, while the cell membrane helps support animal cells.
Because carnivores only eat meat. Or as the dictionary says, "carnivores feed on <em>flesh</em>" Flesh is meat. Not plants.
If a carnivore did eat plants <em>instead </em>of meat, then they'd be an herbivore.
If a carnivore ate plants <em>and </em>meat, they'd be an omnivore.
Answer:
Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.
The answer would be 20 amino acids found in living organisms
