Q: 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? OPTIONS:
- Antarctica has always had the same climate as at present.
- At some time in the past, Antarctica was a hot, dry desert.
- At some time in the past, Antarctica was much warmer and wetter.
- At some time in the past, Antarctica was colder and wetter than it is now.
A: At some time in the past, Antarctica was much warmer and wetter.

The water contained in a geyser system gains energy from the underground material surrounding it. The water molecules gain kinetic energy and this results in an increase in the pressure of the water. Eventually the geyser erupts and expels water into the air above ground. Which of the following types of energy is the source for the initial energy gain of the water?
OPTIONS:
- electrical
- magnetic
- mechanical
- thermal

thermal

Q: In a copper wire, a temperature increase is the result of which of the following? ---- OPTIONS:
- an increase in the size of the copper particles
- a decrease in the mass of the copper particles
- an increase in the motion of the copper particles
- a decrease in the distance between the copper particles

A: an increase in the motion of the copper particles

A single prokaryotic cell can divide several times in an hour. Few eukaryotic cells can divide as quickly. Which of the following statements best explains this difference?
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OPTIONS:
- Eukaryotic cells are smaller than prokaryotic cells.
- Eukaryotic cells have less DNA than prokaryotic cells.
- Eukaryotic cells have more cell walls than prokaryotic cells.
- Eukaryotic cells are more structurally complex than prokaryotic cells.

Eukaryotic cells are more structurally complex than prokaryotic cells.

Question:
Which adaptation will warn predators not to eat an animal?
OPTIONS:
- bright colors
- bulging eyes
- geometric shapes
- poisonous secretions
Answer:
bright colors

*Question*: Sheep Challenge Evolution A species of sheep lives on the Scottish island of Hirta. Hirta has plenty of grass for the sheep to eat, and no natural predators of the sheep live on the island. Some sheep have dark wool, and some have light wool. The sheep with dark wool tend to be much larger and stronger than the sheep with light wool. However, researchers have found that in the last 20 years, the sheep with light wool have increased in number. Usually, strength and size help animals survive and breed. On Hirta, sheep with light wool outnumber sheep with dark wool because sheep with light wool OPTIONS:
- produce more wool
- have a more restricted diet
- produce fewer offspring each year
- have a better chance of surviving and reproducing
*Answer*:
have a better chance of surviving and reproducing