The chordates were originated from a fish-like ancestor, very similar to the larva of the Ascidia (Tunicata) and it is assumed that they became the ancestor of the chordates by retaining the larval form throughout the life. In the palaeozoic age, the chordates were originated from some sessile Echinoderms, which were bottom dwellers of the … Read more
Angiosperms are known as flowering plants which include the trees, herbs, and shrubs. They are vascular seed plants and form the largest and most diverse group within the kingdom Plantae. Around 300,000 species of angiosperms are found in the world which represents 80% of all the known green plants. They have a proper root system … Read more
The word respiration is derived from the Latin ‘respirare’ meaning to breathe. Generally, respiration is the physio-chemical process which leads to the chemical breakdown of materials to provide energy for life. It occurs inside the living cells of all types of organisms (from prokaryotic bacteria and Achaeans to eukaryotic protests, fungi, plants, and animals) to … Read more
Carbohydrates are the most widely distributed compounds in both plants and animals. Plants can build up carbohydrates from carbon dioxide (CO2) by the process of photosynthesis. The living body contains 1 percent of carbohydrates. Many plants and animals contain large quantities of carbohydrates as reserve food material. They are the compounds which provide energy to … Read more
Algae are the green slimy blanket which covers the rock surface or the top of the ponds or a poorly kept aquarium that have the ability to conduct photosynthesis. The algae belong to the subphylum Thallophyta of the kingdom Protista in modern classification of organisms. Latin ‘alga’ means seaweed. These are eukaryotic organisms, autotrophic in … Read more
The cell wall is the semi-rigid, laminated, semi-permeable non-living outermost cellulose coat which is positioned next to the cell membrane of the plant cells, Fungi, Algae, Bacteria, and some Archaea. The protoplasm of the plant cells is separated from the external world by the cell wall which is entirely lacking in animal cells. Generally, the … Read more