A flower produces seeds that fall to the ground and grow into new plants that produce more flowers. The seeds begin to grow by the process of
A: germination.

Of the examples listed, which event is thought by scientists to have led to the greatest extinction?
A: whalers of the 17th, 18th, and 19th centuries

Sandra puts some pill bugs into an open box. She covers half the box with a piece of cardboard. She then places the box outside on a summer day, and all the pill bugs move under the cardboard. The pill bugs are most likely responding to which of the following?
A: bright light

Which of these is directly formed as a result of weathering and erosion?
A:
sediments