Sexual Reproduction in Flowering Plants! The reproductive part of a flowering plant is the flower. Flowers are considered to be modified shoots. Parts of a Flower: Most flowers have both the male and female reproductive organs, but some bear either the male or the female sex organs. Such flowers are known as unisexual flowers (e.g., watermelon, cucumber, etc.) Those flowers [...]
Exchange of Gases in Plants! In plants, oxygen and carbon dioxide diffuse through the stomata and the intercellular spaces of the leaves, and the lenticels of the bark. In woody plants, the stem is covered with bark. Lenticels are small openings in the pits of the bark. The exchange of gases takes place through the lenticels also, apart from the [...]
Main modes of nutrition in plants and animals are: 1. Autotrophic nutrition 2. Heterotrophic nutrition! Plants and animals do not obtain food by the same processes. Plants and some bacteria have the green pigment chlorophyll to help synthesize food, while animals, fungi and other bacteria depend on other organisms for food. Based on this, there are two main modes of [...]