State the criteria for deciding divisions in plants?
Basis of division in Kingdom Plantae
1. Differentiated body parts: Body is differentiated into leaves, stems, roots, flower, etc.
2. Presence of vascular tissue: There are two types of vascular tissues present in the plants:
Xylem: helps in transport of water.
Phloem: helps in transport of food.
3. Reproduction through seeds or spores:
Phanerogamae: Plants with seeds are called phanerogamae. They contains embryo with stored food and are multicellular.
Cryptogamae: Plants with spores are called cryptogamae. They contains only naked embryo and are generally unicellular.
4. Seeds are inside the fruit or naked:
Angiospermae – these are plants with seeds inside the fruit and bears flowers.
Gymnospermae – these are plants with naked seeds and do not bear flowers.
Note – If xylem and phloem are absent the plants would be small as transport of food and water will be difficult.