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

State the replication of dna strands, Which of the following statement is t...

Which of the following statement is true regarding the replication of DNA strands? A. The products of replication include one double helix made exclusively of parental DNA and

Strobilation - types of asexual reproduction, Strobilation - Types of Asexu...

Strobilation - Types of Asexual Reproduction Strobilation is a type of asexual reproduction in which successive segments are separated off from the body one after other. It is

Classification of plants and animals, Q. Classification of plants and anima...

Q. Classification of plants and animals? The first and foremost step in the classification of plants and animals is the. grouping together of individual organisms on the basis

What is r - wave amplitude, Q. What is R - Wave Amplitude? The R-wave a...

Q. What is R - Wave Amplitude? The R-wave amplitude in the lateral precordial leads usually decreases more in normal than in abnormal subjects and correlates with left ventr

Cellular strategies to improve bone formation at implants, Molecular and ce...

Molecular and cellular strategies to improve bone formation at implants The healing response of biological tissues to the oxide surface is sensitive to the way in which the sur

Productivity in medical transcription, Describe several factors which affec...

Describe several factors which affect Productivity in Medical Transcription. Definition of Medical Transcription Show the various factors thataffect Productivity in Medi

X-linked dominant genes, X-Linked Dominant Genes Dominant X-linked gene...

X-Linked Dominant Genes Dominant X-linked genes are always expressed in both the sexes just as in autosomal traits. One dose of X-linked dominant allele produces its effects in

Describe the factors of biological evolution of humans, Although there are ...

Although there are differences in interpretation of the evidence, it is generally accepted that human biological evolution has not been a linear progression from one species to the

Female reproductive system - fallopian tube, F ALLOPIAN TUBE - Ferti...

F ALLOPIAN TUBE - Fertilisation occur in it. 10-12 cm long muscular tube. It is supported by double fold of peritonium. It shows 4 regions - (i ) Infundibulum - Bro

Define influence of polyphenols on proteins, Define Influence of Polyphenol...

Define Influence of Polyphenols on Proteins? You know that tannins are considered as anti-nutritional because their presence is usually accompanied by a reduced protein digesti

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