significance of fruits

State 3 functions of fruits

1)Protect enclosed seeds

2)Dispersal

*When mature aids in dispersal by

i)Wind

ii)H2O

iii)Animals

3)Support for next generation

*Once dispersed if env conditions are favourable seed may germinate to from seedling

Define Seed dormancy(3)

1)Inhibition embryo within seed

2)at one stage of maturation naturally 3)preventing germination of seeds within fruit

Many seeds have mechanisms of inhibiting germination & remain dormant explain some mech(wrt)

Many seeds have mechanisms to inhibited germination & remain dormant

1)Precense of inhibitors

2)Precense of thick/strong seed coat

3)Precense of seed coat impervious to water

After breaking seed dormancy seed starts to germinate write the factors affecting breaking(wrt)

After breaking seed dormancy seed starts to germinate

1)H2O

2)O2

3)Suitable temperature

Define Seed germination

1)Absorbtion of H2O,activation of Ezy,mobilization of food resources

2)Followed by rapid growth process of Embryo

3)Extending the radical through the seed coat

Explain the geotropism in seed germination

1)Positive geotropism

*Radicle shows

2)Negative geotropism

*Plumule shows