Understanding the Structure and Functions of Plants

Heart-wood is the central part of a tree that is least affected by external factors such as weather, disease, and insects. It is denser and harder than the sapwood and provides strength and stability to the tree.

Q20. What is the function of xylem and phloem in plants?
Ans. Xylem is responsible for transporting water and minerals from the roots to the leaves, while phloem is responsible for transporting sugars and other organic compounds produced by photosynthesis from the leaves to the rest of the plant.

Q21. What is the difference between a stem and a root ?
Ans. A stem is a part of a plant that grows above the ground and supports the leaves and flowers, while a root is a part of a plant that grows below the ground and absorbs water and minerals from the soil.

Q22. What is the purpose of chlorophyll in plants?
Ans. Chlorophyll is responsible for absorbing sunlight and converting it into energy through photosynthesis, which is necessary for the growth and survival of plants.

Q23. What is the difference between a leaf and a blade ?
Ans. A leaf is a part of a plant that has veins and is responsible for photosynthesis, while a blade is a flat, thin part of a leaf that does not have veins.

Q24. What is the function of a flower in a plant?
Ans. A flower is a reproductive structure of a plant that produces seeds, and it also attracts pollinators such as bees and butterflies to facilitate reproduction.

Q25. What is the difference between a fruit and a vegetable ?
Ans. A fruit is the edible part of a plant that contains seeds, while a vegetable is any other edible part of a plant such as the leaves, stems, or roots.