Which process is a sudden movement caused primarily by gravity

Which of these BEST describes the benefit of variation within a species? Select one: It is energetically inexpensive for organisms to maintain. It occurs even among organisms that are isolated from other organisms It allows most organisms to find appropriate mates. It ensures some organisms can survive an environmental change.

A 5 KG block is on a frictionless surface . A 15 N force is applied to the block in a direction parallel to the surface .what is the acceleration of the block?

Which describes a characteristic shared by plant-like, animal-like, and fungus-like protists?

A lizard stays warm by sunning itself on a rock