Question

8. Read the clues and solve the crossword: Across 1. A green pigment present in leaves and tender stems. (11) 2. The process of fusion of male gamete with the female gamete to form zygote. (12) 3. Supporting roots in banyan tree. (9) 4. The flat portion of leaf. (6) Down 5. Leaf-like structures present in the outermost whorl of a flower. (6) 6. The pipe like structures present in stem which carry prepared food from leaves to the other plant parts. (6) 7. Other name given to 'true roots'. (8) 8. The angle between stem and the leaf. (4)​

Answer 1

1. Green plants are green because they contain a pigment called chlorophyll. Chlorophyll absorbs certain wavelengths of light within the visible light spectrum.
2. The term used to describe the male and female gametes fusion is fertilization. Fertilization can be described as the fusion of the male gametes (pollen) with the female gametes (ovum) to form a diploid zygote. It is a process that occurs after the pollination of the carpel.
3. The root hanging from the branch of banyan tree are prop root, which are developed from the main branches of tree. These root grow straight downward to the soil, which they enter and form underground root. Due to secondary growth these became thick and provide mechanical support to the plant.
4. Leaf blade
5. The outermost whorl of the flower has green, leafy structures known as sepals. The sepals, collectively called the calyx, help to protect the unopened bud. The second whorl is comprised of petals—usually, brightly colored—collectively called the corolla.
6. phloem
7. A true root system consists of a primary root and secondary roots (or lateral roots). the diffuse root system: the primary root is not dominant; the whole root system is fibrous and branches in all directions. ... The main function of the fibrous root is to anchor the plant
8. STEM