2. What can be said about organisms belonging to the same species?
(a) They originated from the same location.
(b) They will change at the same rate.
(c) They have similar habits.
(d) They will produce the same type of variations.

3. How do breeders know if the traits they breed into cows are useful?
(a) They appear at birth.
(b) They appear in adulthood.
(c) They appear in late childhood.
(d) They appear prior to birth.

4. In Geographical Distribution continued, what does Darwin suggest about the rule of natural selection?
(a) It is different on islands.
(b) There is a common ancestor.
(c) It applies to all species.
(d) It does not apply to all species.

5. What insect does Darwin offer as an example of having a naturally selected trait that is NOT beneficial?
(a) Bee.
(b) Aphid.
(c) Fly.
(d) Spider.

6. Why do scientists believe fossils do not exist at the bottom of the ocean?
(a) Fossils are only found on land.
(b) They cannot get to the bottom.
(c) No species that far down.
(d) Too much pressure.

7. Why might a hybrid species NOT survive birth?
(a) Physical deformities.
(b) Natural selection.
(c) It is half-related to the mother and has difficulty surviving in the womb.
(d) Poor respiration.

8. What does the bone structure of the human hand resemble?
(a) Paw of a dog.
(b) Hoof of a horse.
(c) Fin of a fish.
(d) Wing of a bat.

9. What species of bee builds the most efficient hives?
(a) Honeybees.
(b) Hive-bees.
(c) Yellowjackets.
(d) Bumblebees.

10. What is one variation found in birds that migrate?
(a) Duration of migration.
(b) Location of migration.
(c) Distance of migration.
(d) Timing of migration.

11. What does Darwin suggest that freshwater fish could develop through selection?
(a) Gills.
(b) Ability to breathe out of water.
(c) Lungs.
(d) Ability to live in salt water.

12. What do naturalists understand will never happen to most organisms?
(a) Extinction.
(b) Fossilization.
(c) Selection.
(d) Evolution.

13. What does Darwin state is a main difference between first generation mongrels and first generation hybrids?
(a) First generation mongrels show less variation.
(b) First generation mongrels are larger.
(c) First generation mongrels show more variation.
(d) First generation mongrels show no variation.

14. What does the fossil record show about natural selection?
(a) Adaptations.
(b) Variations.
(c) Gradual change.
(d) Quick change.

15. What do some geologists suggest about islands in the Atlantic and the continent of Europe?
(a) They have the same species.
(b) They have the same climate.
(c) They were once connected.
(d) The species are completely different from one another.