1. Give an example (the name of an animal) which adapts to its environment using the following methods:

1. Camouflage ……………………………………………………………………………….

2. Hibernation ……………………………………………………………………………….

3. Aestivation ……………………………………………………………………………….

4. An aquatic plant …………………………………………………………………………

5. A desert plant with spiral leaves…………………………………………………………

6. A desert plant with fleshy (juicy) stem…………………………………………………

2. What the function of:

1. Air chambers for the elodea plant.

……………………………………………………………………………………………………

2. Thick pads for the camel.

……………………………………………………………………………………………………

3. Long branched roots for calmagrostis.

… …………………………………………………………………………………………………

4. Long eye lashes & lacrymal glands for the camel.

……………………………………………………………………………………………………

5. Burrows for reptiles.

……………………………………………………………………………………………………

6. Fleshy (juicy) stem in some desert plants.

……………………………………………………………………………………………………

7. The ribbon – like leaves of elodea.

……………………………………………………………………………………………………

3. Choose the correct answer:

1. In winter , frogs……………………the body activities.

(reduce – increase – don’t change)

2. The desert is characterized by……………………

(shortage of water – plenty of water – low temperature during day)

3. Elodea lives……………………………

(submerged in water near the surface – in the desert – deep in irrigation canals)

4. Give reasons for the following:

1. Some animals hibernate.

……………………………………………………………………………………………………………………………………………………………………………………………………….

2. Some birds migrate from their usual habitats during winter.

……………………………………………………………………………………………………………………………………………………………………………………………………….

3. The camel’s fur is denser over vital organs & thinner in other areas.

……………………………………………………………………………………………………………………………………………………………………………………………………….

4. Elodea roots are weak.

……………………………………………………………………………………………………………………………………………………………………………………………………….

5. Opuntia leaves are spiny.

……………………………………………………………………………………………………………………………………………………………………………………………………….

6. The hump of the camel stores fat.

……………………………………………………………………………………………………………………………………………………………………………………………………….

5. Compare elodea plant to calmagrostis plant in the following table:

Points of comparison	Elodea	Calmagrostis
Environment
Shape & function of the roots
Shape & function of the stem
Shape & adaptation of the leaves

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