Uhm u should know its by pollen thats transferred by bees so asexually>
Density can be useful in identifying substances. It is also a convenient property because it provides a link (or conversion factor) between the mass and the volume of a substance. Mass and volume are extensive (or extrinsic) properties of matter - they depend on amount.
A planarian can regrow any missing body part. Truth be told, in the event that you take a planarian and excise it into a few little pieces, every last one of those body sections can recover into an entirely different worm.
When organisms produce more offspring than survive, the area can become overcrowded, and they will compete for nutrients and other resources and necessities.