DENDROLOGY

Detailed explanation-1: -Plants can synthesise food for themselves but animals including humans cannot. They get it from plants or animals that eat plants. Thus, humans and animals are directly or indirectly dependent on plants. Plants are the only organisms that can prepare food for themselves by using water, carbon dioxide and minerals.

Detailed explanation-2: -Green plants are the only living organisms that produce their own food. Light provides the energy to create a chemical reaction within specialized cells, called chloroplasts, in the leaves. Chlorophyll present in the chloroplasts captures light energy and uses it to produce simple sugars from carbon dioxide and water.

Detailed explanation-3: -Humans and animals are directly or indirectly dependent on plants for food because plants are the only living beings who can make their own food.

Detailed explanation-4: -All food comes from plants, even animals depend on plants. Hence, we obtain food from plants directly or indirectly. The reason one is advised to consume fruits and vegetables on a daily basis is that it is a source of rich nutrients.

Detailed explanation-5: -A plant has a cell wall, chloroplast, plasmodesmata, plastids, and different organelles. Animal cells lack cell walls but contain different organelles such as tight junctions and cilia. In the plants, the growth is done by the meristematic system located at the tip of roots and stems.