Seed

Question 1

Define fruit, seed, grain

Answer 1

Fruit is the enlarged ripened ovary.
Seed is the ripened ovule.
Grain is actually a fruit in which the fruit wall and seed coat are fused.

Question 2

Largest seed

Answer 2

Coconut/Double Coconut

Question 3

Types of seed?

Answer 3

Albuminous(endospermic) and Exalbuminous(non-endospermic)

Question 4

Parts of seed coat in bean seed (2T)

Answer 4

Testa & Tegmen

Question 5

Tiny pore and white scar on bean seed is called

Answer 5

Micropyle and Hilum

Question 6

Functions of Micropyle

Answer 6

i)Helps seeds absorb water.
ii)Diffusion of respiratory gases.

Question 7

Radicle grows into____
Plumule grows into_____

Answer 7

Root
Shoot

Question 8

What 2 parts are fused in maize grain?

Answer 8

Seed coat and fruit wall

Question 9

Define germination

Answer 9

Germination is the process of formation of a seedling developed from the embryo

Question 10

Conditions necessary for germination

Answer 10

i)Water
ii)Oxygen
iii)Temperature (25°C to 35°C)

Question 11

What are the types of germination?

Answer 11

Hypogeal and Epigeal

Question 12

What happens in Hypogeal germination?

Answer 12

i)Cotyledons remain underground.
ii)Epicotyl grows/elongates faster.
iii)Usual in monocotyledonous seeds.

Question 13

What happens in Epigeal germination?

Answer 13

i)Cotyledons are pushed above the ground.
ii)Hypocotyl grows/elongates faster.
iii)Usual in dicotyledonous seeds.

Question 14

What is Viviparous germination?

Answer 14

Seed germinates inside the fruit
eg:_ Rhizophora

Question 15

What does Pyrogallic acid absorb

Answer 15

Oxygen