Dinosaurs emerged during what time period?

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

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 .

Which muscle is responsible for inhalation ?