Movement, Biology


Movement is another characteristic of living things. It does not always mean locomotion or movement from one place to another. In animals movement is quite obvious. We move our arms and legs; we also move from place to place. Most animals can move in this manner at least at some stage of their life. Movement in plants is not so obvious. However, if you observe plant cells under a microscope, you can see streaming movement of cytoplasm within them.

This is called cyclosis. Some plants like Mimosa and Venus's flytrap show obvious movements, as you have read before.The mode of locomotion in animals varies. Some lower animals move about by the beating of tiny hair like cilia or longer flagella. Some like amoebae move about using pseudopodia, which are temporary extrusions of cytoplasm. A few animals such as sponges, corals, oysters and certain parasites do not move from place to place.

However, most of these have free swimming larval stages. Moreover, even in the sessile adults, cilia or flagella or tentacles move rhythmically.Thus you find that one or more of the above characteristics distinguish living things from the non-living. However, the most important of these criteria is reproduction because that is the most unmistakable characteristic of living things.

Posted Date: 1/12/2013 2:35:13 AM | Location : United States

Related Discussions:- Movement, Assignment Help, Ask Question on Movement, Get Answer, Expert's Help, Movement Discussions

Write discussion on Movement
Your posts are moderated
Related Questions
Define Vigorous or vigorously active lifestyles - physical activity? These people engage regularly in strenuous work or in strenuous leisure activities for several hours. Examp

Determine the Syndrome of Listeriosis Syndrome: Listeriosis in humans is not characterized by a unique set of symptoms since the course of the disease depends upon the state

Q What is the excretion? Excretion in Physiology is the procedure of elimination of metabolic wastes and other toxic substances from the body.

Cephalisation - Metazoa Bilateral animals when creeping or swimming, have a tendency to keep the same end of the body forward and the same surface down towards the substratum.

Define Regents for Determination of Inorganic Phosphorus? 1. Trichloroacetic acid (10%) - Dissolve 100 g of high grade crystalline acid in distilled water and dilute to 1 Litre

Explain the Canal Obstruction File work shorter than the normal apical and feel a great resistance to reach true length. a. A retained instrument o Canal calcification b.

What is Nagel's Anomaloscope The patient is asked to match a yellow with a mixture of red and green wave lengths. A defect can be detected based on the amount of red and green

Are viruses cellular organisms?