Movement, Biology

Assignment Help:

Movement

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.


Related Discussions:- Movement

Enterocoelous pattern – coelom, Enterocoelous pattern – Coelom In ent...

Enterocoelous pattern – Coelom In enterocoelous development of coelom the mesoderm arises in the embryo as paired lateral pouches growing out from the archenteron. The pouche

Define the dietary requirements of phosphorus, Define the Dietary Requireme...

Define the Dietary Requirements of phosphorus? We read in the previous section that the requirements of phosphorus are closely linked with those of calcium. The phosphorus req

Define classification of carbohydrates - polysaccharides, Define classifica...

Define classification of carbohydrates - Polysaccharides? This classification is based on the number of monosaccharide units they contain, Polysaccharides are those polymers of

Define nutritional requirements of fats and oils for adults, Define Nutriti...

Define Nutritional Requirements of Fats and Oils for Adults? A desirable amount of a linoleic acid to be consumed by a normal adult is 3 en% (ICMR, 1990). The invisible fat pre

Why in some cases is mitosis a synonym of reproduction, Why in some cases i...

Why in some cases is mitosis a synonym of reproduction? In some living beings asexual reproduction happens by many means: binary division, schizogony, budding, grafting, etc. I

What is salmonella typhosn, What is salmonella typhosn Typhoid is  an e...

What is salmonella typhosn Typhoid is  an enteric fever, which relates  to acute infection of  short duration. It is   caused by bacteria called Salmonella typhosn about which

Why is maternal milk important for the immune protection, Why is maternal m...

Why is maternal milk important for the immune protection of the baby? Besides being nutritionally significant, maternal milk participates in the defense of the baby against inf

Explain the dietary management of a lactating mother, Explain the Dietary M...

Explain the Dietary Management of a lactating mother? Meeting the needs of lactation requires a varied nutrient-dense diet. Generally, a well-balanced diet will meet nutrient n

Define polysaccharides (dp: > 9) - carbohydrates, Define Polysaccharides (D...

Define Polysaccharides (DP: > 9) - carbohydrates? Polysaccharides are high molecular weight polymers of monosaccharide units formed by glycosidic bonding. They may be long unbr

circulation patterns, Normal 0 false false false EN-IN...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd