Viva Voce: Features of Monocot and Dicot Plants | Lab Manuals for Class 9 PDF Download

Q.1. Name the world’s largest seed and smallest seed.

The largest seed is coco-de-mer and smallest seed is orchid seed both are Monocots.

Q.2. Which root system contain bulbs?

Fibrous root

Q.3. A student observed the slides of T.S. of maize, what type of vascular bundles are seen?

The T.S. of maize shows scattered vascular bundles.

Q.4. What is the function of endosperm?

It provides food for the developing embryo.

Q.5. How many petals do monocot and dicot flowers bear?

The monocot flowers bear 3 petals or multiples of 3, the dicot flowers bear 4, 5 or multiples of these numbers of sepals and petals.

Q.6. What is the function of bulbs present in monocot roots?

The fibrous roots are short, gives less nutrient to the plant, during spring when leaves are shed, these bulbs supply stored food in them to the plant.

Q.7. On soaking the monocot and dicot seeds, which germinates faster?

Monocot seeds germinate faster than the dicot seeds.

Q.8. What is common in sugarcane, banana and pineapple?

All of these are Monocots.

Q.9. Name different parts of seed.

The seed has seed coat, endosperm, embryo.

Q.10. Name two divisions of Angiosperms.

Monocots and Dicots.

Q.11. What are tepals?

In monocot flowers the sepals and petals are mostly of same colours, together they are called tepals.

Q.12. Name the largest family plants of Monocots.

Orchids.

Q.13. What is the radicle?

The first outgrowth from the germinating seed is called radicle.

Q.14. An unknown plant contains 6 petals, leaves show parallel venation, is it a monocot or dicot?

It is a monocot plant.

Q.15. What are cotyledons?

The seed leaves are called cotyledons.

Q.16. What type of stem do we see in monocot plants?

The stem is soft, unbranched and not woody.

Q.17. When the monocot seed starts germinating initially what type of root system do you observe?

The initial root that comes out of the germinating seed is tap root, it dies and is replaced by adventitious roots.

Q.18. Which division of angiosperms provides the food-grain in large quantity?

Monocot seeds are the largest food crop. eg. wheat, maize, rice, barley.

Q.19. What is micropyle?

The weak spot in the seed coat where the radicle escapes out is called micropyle.

Q.20. Identify the seed of the plant.

It is a dicot seed as two cotyledons are seen.