Describe various parts of flowers and their functions 12th sci biology
Answers
Answer:
Parts Of Plants
- Roots
- stem
- leaves
Roots:
Roots are the underground part of a plant. They are the major part that anchors the plant firmly in the soil. They absorb water and minerals from the soil, synthesise plant growth regulators, and store reserve food material. The apical part of the root is covered by the root cap that protects the root apex.
The direct elongation of radicle leads to the formation of primary roots that grow inside the soil in dicots. It bears lateral roots that are known as secondary and tertiary roots.
Stem:
The stem is the part of the plant above the ground. It bears leaves, fruits and flowers. The region where the leaves arise is known as the node and the region between the nodes is known as the internode.
The stem provides support to the plant. They also protect the plant and help in vegetative propagation. A few underground stems such as potato and ginger are modified to store food.
The stem tendrils are spirally coiled and help the plant to climb a support. The axillary buds also get modified into thorns that protect the plant from grazing animals.
The important functions of stem include:
Support:
Primary function of the stem is to hold up buds, flowers, leaves, and fruits to the plant. Along with the roots, a stem anchors the plants and helps them to stand upright.
Transportation:
It is the part which transports water and minerals from the root and prepared food from leaves to other parts of the plant.
Storage:
Stems are one of the storerooms of plants where the prepared food is stored in the form of starch.
Reproduction:
Few stems help in reproduction through vegetative propagation.
Leaves:
Photosynthesis:
Green leaves prepare food for plants by using water and carbon dioxide in the presence of sunlight. This is the process called photosynthesis.
Transpiration:
Other than photosynthesis, leaves play a crucial role in the removal of excess of water from plants through tiny pores called stomata. This is the process of transpiration.
Reproduction:
Leaves of some plants helps in reproduction also. For e.g. leaves of Bryophyllum give rise to a new Bryophyllum plant.
Answer:
Explanation:
Flowers are attractive and appear in different colours and shapes to attract pollinators who help in pollen transfer. Most flowers have four main parts: sepals, petals, stamens, and carpels. The stamens are the male part whereas the carpels are the female part of the flower.