Fast response - biological responses, Biology

Assignment Help:

Fast Response - Biological Responses

Some of the fast responses are discussed below:

  1. It was found that when mung bean root tips were kept in a specific solution (containing ATP, IAA, ascorbic acid, MnCl2, KCl) the root tips adhered to a glass beaker when irradiated with red light. This effect was reversed by far-red light within 30 seconds. It is suggested that the quick response is probably due, to change in electric charges on the root tips in response to red light, so the root, tips adhere on to the negatively charged glass surface. Such a response can be classified as a fast response.
  2. Similarly, it was shown that if alga, Mougeotia was irradiated, its single chloroplast turned in response to red light but far-red light alone had no effect. The red light effect was reversed by far-red light. This movement was also noticed within minutes of irradiation. In fact, in these experiments, the light was irradiated on the cytoplasm or membranes barrier and not onto the chloroplast directly.
  3. In many leguminous plants it was found that leaves closed if they were transferred from light to darkness. It has been shown that this response is under phytochrome control.

Related Discussions:- Fast response - biological responses

What chemical is used to test for the presence of co2, What chemical is no...

What chemical is normally used to test for the presence of carbon dioxide? What is the result of the test if carbon dioxide is present?   a) Lime water is used t

Determine the function of iron for athletes, Determine the function of Iron...

Determine the function of Iron for athletes? Iron carries oxygen and is another important mineral for athletes. It also affects oxygen transport and aerobic metabolism as a com

How the brain influences or controls immune system, How the brain influence...

How the brain influences or controls immune system Scientists are still working to determine to what degree, and how, the brain influences or controls immune system functions,

Respiration, what is the meaning of direct and indirect respiration

what is the meaning of direct and indirect respiration

Glucose is a good source of energy for bacteria, Why is glucose such a good...

Why is glucose such a good source of energy for bacteria? 1) Glucose contains six oxygen atoms, which can be used for oxidative phosphorylation and the generation of many ATP molec

Define procedure for detection of number of bacteria in milk, Define Proced...

Define Procedure for Detection of Number of Bacteria in Milk? 1. Place a clean, non-greasy slide over the graph paper. 2. Spread 0.01 ml of the milk over an area of 1 cm2 as

Photoreceptor - phototropism, Photoreceptor - Phototropism The molecul...

Photoreceptor - Phototropism The molecular nature of the photoreceptor is unsolved. Initially in the 1930s, some form of carotenoid was thought to be the phototropic receptor.

Classes of life form, Classes of Life Form The five life form classes ...

Classes of Life Form The five life form classes are: Phanerophytes, Chamaephytes, Hemicryptophytes, Cryptophytes, and Therophytes.

What is leghemoglobin, The  nitrogenase  complex  is  extremely  sensitive ...

The  nitrogenase  complex  is  extremely  sensitive  to  inactivation  by  O2,  so  the enzyme  must be protected  from this reactive  substance.  During the root nodules of legumi

Avid_vani

6/10/2013 9:46:42 AM

at which point does the semilunar valve of the aorta close?

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