The atmosphere is defined as a gaseous envelope which covers the earth. It consists of many layers. These include the troposphere, stratosphere, mesosphere and thermosphere. The troposphere extends from the…
The earth is mainly formed by the water. It makes more than the 80 percent of the earth surface. The earth is also known as the water planet. The water…
The kingdom animal consists of multi cellular eukaryotic organisms. It consists of many phyla which are mentioned below. Phylum Porifera are pore bearing animals. Phylum Cnidaria has stinging cells and…
Digestive tract is defined as the path through which food travels and goes through the various processes like absorption, digestion and elimination. Animals included under coelenterates and flat worms have…
Respiration is mainly of two types that are aerobic and anaerobic. Aerobic respiration includes cutaneous, branchial and body surface respiration. Aerobic animals require oxygen which is utilized from air or…
There are certain organisms which lose the metabolic wastes through their body by diffusion. It includes sponges, coelenterates and echinoderms. There are flame cells which help in excretion and occur…
The nervous system consists of neurons which help in the conduction of impulse and the coordination of body functions. Sponges do not possess it. Coelenterates have primitive type of nervous…
The waste water can be treated mainly by the three stages which involve the primary, secondary and tertiary stage. The primary stage involves the process in which sewage is passed…
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