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YEAR 9 BIOLOGY IGCSE CAMBRIDGE QUESTIONS

1. a. What is a habitat?

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b. State two adaptations of the following organisms to their habitat

Cactus

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2. Polar bear

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3. Sea-lion

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4. Camel

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5. Water Lily

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6. Spruce tree in arctic region

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2.  (i) Draw the following food chains that show all tropic levels and that consists of:-

1. Chicken as a tertiary consumer

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2. Man as a quaternary consumer

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3. Maize as a producer

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4. Dog as a secondary consumer

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5. Rabbit as a primary consumer

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6. Earthworms a decomposer

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(ii) Connect the food chains above to produce a single food web. [12]

3. (i) State any 2 other decomposers. [2]

   (ii). State 3 importance of decomposers in our lives today [3]

(iii). Complete the passage below to show how the following organisms feed using the following words.

Digest, Energy, dead,cells,decaying,small, absorbed,soluble, repair,enzymes,hormones.

Decomposers feed on dead ………………. matter. They do this by releasing chemical substances called ……………………………. When these chemicals are released, they ………………. the large insoluble molecules of food to …………………..   ………………….. molecules that can be ………………………….by the decomposers. These food molecules are used in the body as a source of ………………………., for making new ……………….and……………… of damaged or worn out organelles.    [9]