Extinction, and Caring for What Remains: Homework

Tell natural extinction from the kind people speed up, and match a rescue to a wetland bird in trouble.

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Part A — Key Words / 4

Type the word that fits each clue.

1.
A marsh is drained and the birds lose the place where they make their homes. What word names that kind of place?Answer
2.
No passenger pigeon is alive anywhere. What word names what happened to the species?Answer
3.
A species has so few left that it could die out soon. What is it called?Answer
4.
An egg and a sperm are joined in a test tube, and the embryo grows in a different female. What is the method called?Answer

Short answers. Think about why.

1.
The fossil record shows big extinctions long before people lived. What is the best-known example?Answer
2.
Environments change and some species die out naturally. What can't those species do?Answer
3.
People have raised the rate of extinction far above the natural one. How, mostly?Answer
4.
A zoo breeds a rare animal, but no wild land is left. Why does the breeding fall short?Answer
5.
Protecting land alone does little for an animal that has dropped to a handful. Why?Answer

A new wetland bird, and the two rescues.

Answer each one in one sentence. You mark these yourself against the key.

1.
Why do the two rescues work better as a pair than alone?Answer
2.
Name one thing people do that harms a habitat, and match it to one of the two rescues.Answer

Done? Check your answers.

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Total / 16

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Notes

Part A — the answers.

Part B — the answers.

Part C — the answers.

a. An endangered species. b. Protect the place. c. Breeding in captivity, to release later. d. They'd have no habitat to be released into. e. Both at once.

Part D — what a good answer includes.

Answers vary. A good answer says breeding keeps the animals alive now while protected land gives them somewhere to go afterward, so each one needs the other.
Answers vary. A good answer names a harm (clearing a forest, draining a wetland) and then a rescue that answers it (protect the natural area, or breed and release).