What controls the direction of a molecule, such as oxygen, involved in passive transport?

All of the populations of different species live and interact in an area

What term describes a species that is brought into an ecosystem where it does not naturally occur? competitor species threatened species introduced species endangered species?

After a natural disaster such as a hurricane or tornado, what will happen in the damaged ecosystem? A) Nothing; it will remain uninhabited. B) A new, different ecosystem will evolve. C) An ecosystem like the previous one will be re-established.

What geologic features allowed the stovepipe dunes to form?

Which consumer you think is a herbivore (eats plants only) ?

How did earth cool down enough to sustain life

Describe the role of environment in obesity.

During mitotic cell division, daughter cells are produced that are genetically their parent cell. submit

Why are frogs said to have 2 lives

A rock with different fossils is shown below: Fossil Layers Fish Shell Fern Oak Based on the fossil, which organism evolved last?