GROWTH AND DEVELOPMENT IN FLOWERING PLANTS

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GROWTH AND DEVELOPMENT IN FLOWERING PLANTS.

Growth and development occur throughout the life of a plant. Development is brought about by increase in complexity of the organism.

In earlier stages of life, plants grow very faster, then growth slows down as they age.

            STRUCTURE OF SEED 

A typical seed is made up of the following parts,

Embryo- the embryo grows and develops into a mature plant which produces more seeds. It is made up of plumule, radical and cotyledons

Plumule- is the part of embryo that develops into a shoot

Radicle- is the part that develops into a root

Cotyledons- have nutrients which are utilized by the seed during germination.

There are two types of seeds depending on the number of cotyledons. These are as follows,

Monocotyledon- are seeds which are made up of one cotyledon example include, maize, rice, wheat

Dicotyledon- are seeds with two cotyledons- examples includes bean seeds, and ground nuts 

Endosperm  this additional nutrient tissue found in some seeds.

Seed coat- it is also called the testa, it encloses fertilized ovule, it has a hole called micropyle which allows the entry of air and water

Hilum is a scar found on the seed, the hilum marks the point of attachment to the funicle.

Funicle- attaches the seed to the placenta of the ovary wall