.
Roots: Roots serve a variety of functions, among them storage, collection of water and nutrients, and support.
.
.
Steams: The stem of a plant supply pathways for distributing water and nutrients between the roots, leaves, and other parts of the plant.
.
Photosynthesis.
Photosynthesis plays a crucial role in the carbon cycle. Carbon constantly circulates in the earth's ecosystem. In the atmosphere, it exists as colorless, odorless carbon dioxide gas, which is used by plants in the process of photosynthesis. Animals get the carbon stored in plant tissue when they eat and exhale carbon dioxide. .
.
Animal Kingdom.
.
The Animal Kingdom includes more than one million living species, grouped into more than 30 categories or classifications. They live in a vast range of habitats, from deserts and Arctic tundra to the deep-sea floor. Animals are the only living things that have evolved nervous systems and sense organs that monitor their surroundings. They are also the only forms of life that show flexible patterns of behavior that can be shaped by past experience. The study of animals is known as zoology.
Characteristic: Animals are multicellular organisms; they share some of the same features with plants and many fungi. But they are also different from plants and fungi too. Plants obtain energy directly from sunlight through the process of photosynthesis, and they use this energy to build up organic matter from simple raw materials. Animals eat other living things or dead remains. They then digest this food to release the energy that it contains. Fungi also take in food, but instead of digesting it internally as animals do, they digest it before they absorb it.
Types of Animals:.
A) Vertebrates and Invertebrates - .
B) Cold-blooded and Warm-blooded Animals -.
Habitats:.
Few parts of the earth's surface are entirely devoid of animal life. Animals cannot survive in places where water is unavailable or permanently frozen, or where temperatures regularly exceed 55 C (130 F).