The transfer oxygen from the air to the blood, which is then sent back to the heart to be pumped throughout the body

Which term best describes a community in which people work mostly in factories? a. agricultural. b. hunting and gathering. c. domesticated. industrial.

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus