TOPIC: PLANTS GROUPS

1: On what basis plants are classified?

Ans. Plants are classified on the basis of seeds.

Two major groups are;

1)    Seed plants.

2)    Seedless plants.

2: How are seed plants are sub grouped?

Ans.  Seed plants are sub grouped as;

1)    Seeds are enclosed in flower or fruit

Rice plants, sunflower, tulip etc.

2)     Naked seeds in a cone shape.                               

Pine, spruce, fir, deodar and yew trees.

3: How does new generation take place in seed plants?

Ans. New generation take place through seeds in seed plants.

4: How does new generation take place in seedless plants?

Ans. New generation take place through dust-like spores in plants. These plants include ferns, mosses, liverworts and algae or seaweed.

5: How are flowering plants classified?
Ans. Flowering plants are classified on the number of cotyledon in their seeds;

♣ Dicots. Have two cotyledons in their seeds.                                                        Fruits, walnuts, carrots, legumes, mustards etc.

♣ Monocots. Have one cotyledon in their seeds. Grasses, lilies, orchids, palms etc.

6: Give main features of ferns?

Ans.     ♣ Live on damp places.

            ♣ Have leaves or fronds made of many small leaflets.

            ♣ Have spores on the underside of their leaves.

7: Give main features of liverworts?

Ans.      ♣ Simple green plants.

             ♣ Live on moist places.

             ♣ Ribbon-like or leafy shape.

   ♣ Have spores.

8: Give main features of mosses?

Ans.       ♣ Simple green plants.

              ♣ Live on moist places.

              ♣ Leaf –like scales.

              ♣ Have spores.

9: Give main features of algae?

Ans.       ♣ Live every where provided with water, light and mineral salts.

              ♣ Smallest is single celled microscopic.

              ♣ Largest is seaweed live in sea water