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

Explain antigens, Explain Antigens ? A blood type, or group, is based ...

Explain Antigens ? A blood type, or group, is based upon the presence or absence of certain substances called antigens on the surface of the red blood cells. Antigens are subs

Gastrulation process - formation of primitive streak, Gastrulation Process ...

Gastrulation Process - Formation of Primitive Streak Gastrulation in all amniotes involving eutherian mammals is related to a characteristic structure termed as the primitive

Excretory organs, what is the excretory organs of,rat,fish,lizard,frog,cock...

what is the excretory organs of,rat,fish,lizard,frog,cockroach,bird and snail.

Simplification and selection of information of consciousness, Q. Simplifica...

Q. Simplification and Selection of information of Consciousness? Simplification and Selection of information: There is much "editing" that goes on in the mind-from the first cu

Cardiomyocytes and motor neurons, Describe the mechanisms and genetic regul...

Describe the mechanisms and genetic regulations that underpin how two cells such as cardiomyocyte and a motor neuron have identical gnomes, yet are functionally and structurally di

Detection of pulmonary hypertension, Pressure calculation made using the Be...

Pressure calculation made using the Bernoulli equation may be used  in conjunction with pressure measurements made by other modalities to determine various intracardiac pressure.

What is the connection between tissue fluid and plasma, What is the connect...

What is the connection between tissue fluid, plasma and lymph? Tissue fluid is plasma (minus its proteins) which has leaked out of the capillaries. Lymph is tissue fluid which

Water potential, why psi g is ignored in water potential of plants?

why psi g is ignored in water potential of plants?

The oxidative phase generates nadph, 1)  The oxidative phase  generates N...

1)  The oxidative phase  generates NADPH The oxidative branch of  the pathway  generates NADPH  and pentose-5-phosphate, through the following  reactions: a)  Glucose-6-pho

Can our experiences change our brain, Can our experiences change our brain ...

Can our experiences change our brain A. It is now know by Scientists that brain is remarkably "plastic:" it continues to change during the course of life in accordance with our

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