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

Values of dpd for plant cells under hypertonic media, Q. What are the value...

Q. What are the values of DPD for plant cells under hypertonic, hypotonic and isotonic media? In plant cells under hypertonic medium there is loss of water for the external, SF

What is meant by saturation or unsaturation of oils and fats, What is meant...

What is meant by saturation or unsaturation of oils and fats? When it is said that a triglyceride is saturated it means that in its molecule the carbon chain is bound in its ma

Vegetative development - development, Vegetative Development - Development ...

Vegetative Development - Development The process of growth and differentiation of cells into organs and organisms is often termed development. For example, the development of

What could have caused the discrepancy, If the class's value did not match ...

If the class's value did not match the expected value of water, let's assume everyone was actually correctly using the devices and there was no "user error." What could have caused

Explain lauric fats - edible fats, Lauric Fats  Fats of this group are ...

Lauric Fats  Fats of this group are derived from certain species of palm, such as coconut. The fats are characterized by their high content of lauric acid (40 - 50%), moderate

Suspensor - pollen biology, Suspensor - Pollen Biology The structure a...

Suspensor - Pollen Biology The structure and function of suspensor have not been given adequate attention. During the last decade, however, investigations have produced notewo

Explain role of mineral salt in creation of electric tension, What is the r...

What is the role of mineral salts in the creation of electric tension (voltage) at the cellular level? The electric activity of the cell, for instance, in neurons, depends on

Supportive therapy for diabetes patient, Q. Supportive Therapy for diabetes...

Q. Supportive Therapy for diabetes patient? Certain foods, part of food or food components have been found to be beneficial in managing hyperglycemia. Most of these have been i

Overturn - thermal stratification, Overturn - Thermal stratification T...

Overturn - Thermal stratification The summer or winter stratification is seasonal. Circulation of lake water occurs twice a year, in the spring and autumn (fall) seasons by a

What is rhizopus - fungi, What is Rhizopus - Fungi? Rhizopus is a commo...

What is Rhizopus - Fungi? Rhizopus is a common laboratory contaminant. It is a spoiling mould and found frequently on the surface of bread, fruits and vegetables. It can grow a

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