In Moving Light 2, light is on the go again, this time in a slow-motion trek through the universe. You track its path as it moves outward from a star (instead of a flashlight). Some of it bounces off asteroids, gases, and dust in its way, just as it reflected off the droplets of fog on Earth. What is this passage describing?

light in space
a star
a flashlight
fog on Earth

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Give the biological term for: structures that display characteristics of living organisms only within living cells

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area