Non-membranous tubules are present in the eukaryotic cell`s cytoplasm. These tubules are hollow and ultrafine and their number is numerous in the cytoplasm. These tubules are made up of protein, known as tubulin which maintains the cell shape and plays an important role in the movement. Other proteins like Kinesin and dynein are also found … Read more
Plants can be broadly divided into two types: flowering plants and non-flowering plants. In this case, flowering plant is also known as angiosperms while non-flowering plant is known as gymnosperms. Based on the nature of the embryo in the seed, angiosperms are again divided into the following two types: Monocotyledonous (Monocots) and Dicotyledonous (Dicots) plants. … Read more
The heart in all animals is a muscular organ. In human, it is placed in the position of the thoracic cavity just behind the sternum and is slightly tilted to the left. Thus, the heart-beat is felt on the left side. It pumps blood throughout the blood vessels to various parts of the body by … Read more
Ecosystems are of two main types such as terrestrial ecosystem and aquatic ecosystem. In this case, terrestrial ecosystems constitute the land masses which cover about 28% of the surface of the Earth. Some notable examples of terrestrial ecosystems are tundra, desert, alpine regions, rainforest etc., while the aquatic ecosystems are found in water environment that … Read more
Blood is a fluid connective tissue which is an essential component in the human body. If the body losses this fluid, it may cause life threatening. Through the clotting mechanism, the body defends against loss of blood. In this case, different coagulation factors, vascular mechanisms, thrombocytes, enzymes, prostaglandins and proteins play important role to clot … Read more
The gymnosperms are a group of seed-producing plants which are also known as Acrogymnospermae. The term ‘Gymnosperm’ is originated from two Greek words, ‘gymnos’ meaning naked and ‘sperma’ meaning seed. It is a smaller ancient group of plants that produce naked seeds because their seeds are not enclosed by a fruit. On earth, more than … Read more