Plant Kingdom
The Plants or plant kingdom is essential for the existence of all the living creatures on earth. The entire mankind depends on the resources obtained from plants. There are innumerable species and types of plants that give us a variety of products for our daily use. Humans and all the other animals on earth are depended directly or indirectly on plants for their existence.
The Plant Kingdom includes a variety of plants that are classified on the basis of the following criteria, whether a plant body contains well-defined body parts. i.e. stem, root and leaf. Presence of vascular system for conduction of water to different body parts of a plant. Presence or absence of flowers and seeds, if the seeds are monocotyledons or dicotyledons, and if the seeds are naked or enclosed in a fruit. The plants have additional features like they are eukaryotic (with a definite nucleus), multicellular, autotrophic (produce their own food), contain chloroplast and chlorophyll pigment for photosynthesis, etc. plants are autotrophic and synthesize their own food due to the presence of chloroplast.
Oxygen is the most important element for the survival of an organism which is produced by plants. They absorb the sunlight and carbon dioxide from the surroundings and convert them into oxygen through the process of photosynthesis. This oxygen is essential for the survival of all animals and humans. Also, they provide us with essential food and medicines.
Bryophytes | Class 11 Biology
Living organisms are classified into five different categories based on their methods of nutrition, cellular structure, modes of reproduction, body composition, etc. R.H. Whittaker gave the Five Kingdom classification. The five kingdoms are Monera, Protista, Fungi, Plantae, and Animalia.
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