Which of the following is NOT an example of a once-accepted scientific fact or theory that turned out not to be true?

A)
The Milky Way Galaxy is the universe.

B)
Earth, fire, air, and water are the four elements.

C)
The Sun is the center of the universe.

D)
Blood circulates in and out of the same vessels located throughout the body.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

The sea slug that considered to be a photosyntheesizing animal