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

Carbohydrates, what is the structural formula for Galactose?

what is the structural formula for Galactose?

Illustrate physiological evidence, Q. Illustrate Physiological Evidence ? ...

Q. Illustrate Physiological Evidence ? Physiological and biochemical evidence is providing data of increasing importance to plant systematic. Recently, it has become apparent t

Classification of protozoa, Classification of Protozoa Traditionally, ...

Classification of Protozoa Traditionally, protozoans have been classified as flagellates, amoebae, sporozoans and ciliates. We have retained this broad grouping for convenienc

Fluoride - mineral elements, FLUORIDE It is mostly available in drin...

FLUORIDE It is mostly available in drinking water. Fluoride is essential for the formation of enamel of the teeth. Deficiency of fluoride causes weakness of enamel.

What is the critical photoperiod, What is the critical photoperiod? How can...

What is the critical photoperiod? How can the critical photoperiod relate to flowering be experimentally determined? The critical photoperiod is the limit of the photoperiod du

Homework, is a cyclone density dependent or independent

is a cyclone density dependent or independent

What is a centimorgan, What is a centimorgan? The Centimorgan, or The r...

What is a centimorgan? The Centimorgan, or The recombination unit, by convention is a distance between two linked genes that corresponds to 1% of recombination frequency of the

Predominant feature of steatorrhoea, Q. Predominant feature of steatorrhoea...

Q. Predominant feature of steatorrhoea? A predominant feature is delayed and defective absorption of fat, which results in bulky stools containing large quantities of fat (know

Organic compounds, ORGANIC COMPOUNDS - They are substances having bo...

ORGANIC COMPOUNDS - They are substances having both carbon and hydrogen which are commonly biological in origin. Organic compounds can be micromolecules or macromolecules

What is the formula for calculation of bone distortion, What is the formula...

What is the formula for calculation of bone distortion The following formula can be used to calculate for distortion: Effective Bone available = Reference sphere diameter ×

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