Available Answers

1. 1.

   Choose the correct option.

   1. Which of these is the smallest living structure?
      1. Cell
      2. Tissue
      3. Organ
      4. Organ system
   2. Which of these protect the flower during its development from bud to flower?
      1. Carpet
      2. Sepals
      3. Petals
      4. Ovary
   3. Which of these moves by contraction and relaxation of its body segments?
      1. Giraffe
      2. Cockroach
      3. Earthworm
      4. Fish
   4. Which of these protects the heart and lungs?
      1. Skull
      2. Rib cage
      3. Limbs
      4. Backbone
   S A M P L E

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   Answer:

   S A M P L E

   1. (a) Cell
   2. (b) Sepals
   3. (c) Earthworm
   4. (b) Rib cage
2. 2.

   Write T for the true statement and F for false one. Correct the false statement(s).

   1. Plants and animals are abiotic components.
   2. The flower has an embryo that develops into a seed.
   3. All joints are immovable.
   4. Boreal forests are very cold and has mostly evergreen trees.
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   Answer:

   S A M P L E

   1. F Plants and animals are biotic components.
   2. F The ovule (not ...
   3. F Some joints are movable (like the e...
   4. ...
3. 3.

   Write one word for the following.

   1. A community that includes plants, animals, and microorganisms.
   2. The loss of water through stomata.
   3. The transfer f pollen grains from anther to stigma.
   4. The area where a particular animal naturally lives.
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   Answer:

   S A M P L E

   1. Ecosystem
   2. Transpiration
   3. Pollination
   4. Habitat
4. 4.

   Name any three modifications of stems with examples.

5. 5.

   What kind of root modification does a dodder plant have?

6. 6.

   What helps birds to fly?