question:
Which two factors determine the gravitational attraction between two objects?

answer:
mass and distance apart

question:
Which of the following is an example of how insects are beneficial to humans?

answer:
Insects pollinate flowering plants.

question:
Which process in plants is most similar to sexual reproduction in vertebrates?

answer:
cross-pollination

question:
Currently, Antarctica is the coldest and driest place on Earth. Paleontologists have found dinosaur fossils in rock layers below the ice. Based on this evidence, which is a reasonable conclusion about the climate of Antarctica in the past?

answer:
At some time in the past, Antarctica was much warmer and wetter.