Cnidarians have specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts. These cells are concentrated around the mouth and tentacles of the animal and can immobilize prey with toxins. Nematocysts contain coiled threads that may bear barbs.
An autotroph produces its own food while a hetertroph has to find it/hunt for it/gather it
Examples~
Autotroph-Sunflower
Heterotroph-Wolf
Answer:
Sorry I can't understand anything
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density
