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

Do you know what the recommendations for fibre are, Do you know what the re...

Do you know what the recommendations for fibre are? Well, the crude fibre intake should be 14 g/1000 Kcal. For adult woman 25 g/day and for adult man 38 g/day is desirable.

Sodium - mineral elements, SODIUM The element is available in table sa...

SODIUM The element is available in table salt. A proper balance of sodium and potassium is essential. Its absorption is under control of aldasterone. The various f

Components of ecosystem, An ecosystem consists of two types of components: ...

An ecosystem consists of two types of components: (a)   Abiotic components: This includes the non-living components of the ecosystem. These are physical and chemical fact

What is the modern darwinist theory, In the time of Darwin the results of M...

In the time of Darwin the results of Mendel's research on biological inheritance had not been published, Genetics was not yet developed, neither DNA nor the concept of genetic muta

Explain the copper toxicity in human, Explain the Copper Toxicity in Human?...

Explain the Copper Toxicity in Human? Acute copper toxicity in humans is rare and occurs due to inadvertent consumption of copper salts. Symptoms include vomiting, diarrhoea, h

Determine the subordinate distinctions horizons, Subordinate Distinctions ...

Subordinate Distinctions In addition to the above mentioned designations, master horizons are further characterised by specific properties such as distinctive colour or the ac

Define dehydration reaction between both molecules, Some organisms contain ...

Some organisms contain enzymes that condense a fatty alcohol and a fatty acid to generate wax esters. Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester gen

What are the characteristics of thick gingiva, Characteristics of Thick Gin...

Characteristics of Thick Gingiva  Relatively flat soft tissue and bony architecture  Dense fibrotic soft tissue  Relatively large amount of attached gingiva  Thick und

How are arthropods characterized, Q Concerning germ layers and the presence...

Q Concerning germ layers and the presence of coelom how are arthropods characterized? Arthropods are triploblastic and coelomate beings (they have three germ layers). Q. Co

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