Scientists say that the gene sequence is"___", meaning that it stayed
essentially the same over a very long period of time.

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 .

18. which statement about cancer is true?

Every early childhood education program should develop a