Answer:
Cnidarians contain specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, and serve to immobilize prey with toxins contained within the cells. Nematocysts contain coiled threads that may bear barbs.
Explanation:
C.
It is d, becuase you divide 500 by 15, and that is the closest answer
There are 6 kingdoms : bacteria, archea, protista, fungi, animalia, and plantae
The 3 domains are : domain bacteria, domain archea, and domain eukarya.
So 6 kingdoms and 3 domains.
The concept that organisms can only come from other organisms is called biogenesis.
The concept of biogenesis has to do with the belief that organisms cannot just arise spontaneously from non-living objects or sources, but can only arise from another living organism through the process of reproduction.
Biogenesis is as opposed to abiogenesis. The latter is a concept that opines that organisms can arise spontaneously from non-living sources without any reproduction.
More on biogenesis can be found here: brainly.com/question/20893589
