What is an organism’s niche?
the physical environment of the organism
the role that an organism plays in the environment
the traits that increase an organism’s survival
the competitors and predators of the organism

Easy 6th grade work! 100 points! i need fast! compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.

Pulmonary arteries carry highly oxygenated blood. true or false?

How are fossils most commonly formed