Q7 of 42 Page 25

How do you distinguish between hypogeal germination and epigeal germination? What is the role of cotyledon (s) and the endosperm in the germination of seeds?

Difference between hypogeal germination and epigeal germination:



Role of Cotyledons and Endosperm in the germination of seeds –


They contain reserved food materials. When seed imbibes water, enzymes get activated, hydrolyze reserve food material and make it available for the germinating seed.


More from this chapter

All 42 →
4

The mode of arrangements of sepals or petals in a floral bud is known as aestivation. Draw the various types of aestivation possible for a typical pentamerous flower.

 5

The arrangements of ovules within the ovary is known as placentation. What does the term placenta refer to? Name and draw various types of placentation’s in the flower as seen in T.S. or V.S.

 6

Sunflower is not a flower. Explain.

 8

Seeds of some plants germinate immediately after shedding from the plants while in other plants they require a period of rest before germination. The later phenomenon is called as dormancy. Give the reasons for seed dormancy and some methods to break it.