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This test consists of 5 multiple choice questions, 5 short answer questions, and 10 short essay questions.

Multiple Choice Questions

1. What percentage of all existing water is fresh water?
(a) 23.
(b) 17.
(c) 3.
(d) 10.

2. Bacteria take nitrogen from the air and form it into what?
(a) Water.
(b) Amino acids.
(c) Fluoride.
(d) Nitric oxide.

3. The dodo was a:
(a) Three-footed lizard.
(b) Flightless bird.
(c) Large rodent.
(d) Miniature whale.

4. When the KT meteor that killed the dinosaurs hit Earth, what percentage of life on the planet perished?
(a) 15.
(b) 70.
(c) 95.
(d) 40.

5. By volume, how much of the Earth's habitable space is covered by water?
(a) 71.75 percent.
(b) 80.5 percent.
(c) 87.75 percent.
(d) 99.5 percent.

Short Answer Questions

1. Humans share 98.4 percent of their DNA with:

2. What was the HMS Beagle, and how was it related to Charles Darwin?

3. Gregor Mendel, who conducted research on transmittal of traits in pea plants, was a scientist and a:

4. The internal workings of cells are:

5. The author states that one scientist claimed there is less genetic diversity among the entire human population than there is among a:

Short Essay Questions

1. How much of Earth's land is suitable for humans to live on?

2. What is a hominid? Describe some of the hominids that existed in the past.

3. Describe the fossilized traces of microbes found in Greenland.

4. What did scientists find in the Burgess Shale of British Columbia?

5. Describe the presence of bacteria in humans.

6. How long do human cells live?

7. Why does Bryson say that fossils represent only a tiny fraction of life on Earth?

8. Why haven't scientists discovered every species of plant and animal life yet?

9. What is the water distribution across the world's major oceans?

10. How are traits determined genetically?

(see the answer keys)

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