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

Experiment turn out differently then you expected, If the results of an exp...

If the results of an experiment turn out differently then you expected, what does that mean? A. The experiment was a failure B. You did not follow scientific method C. You should e

GENETICS.., DO I GET MY ANSWERS RIGHT AWAY?

DO I GET MY ANSWERS RIGHT AWAY?

Name of the terminal portion of the axon, Q. What is the name of the termin...

Q. What is the name of the terminal portion of the axon? The terminal portion of the axon is called as presynaptic membrane Through, this membrane neurotransmitters are release

Enumerate the absolute and relative contraindications, Enumerate the absolu...

Enumerate the absolute and relative contraindications. 1. Absolute contraindications - Recent myocardial infarction - Valvular prosthesis - Severe renal disea

What is lactate, What is Lactate Lactate is transported to  the liver...

What is Lactate Lactate is transported to  the liver in  the Cori cycle (lactic  acid cycle)  and is converted to pyruvate. Hepatic gluconeogenesis then converts  lactate  ba

Why are the plants having single-seeded fruits, Why are the plants having s...

Why are the plants having single-seeded fruits and plants having fruits with surplus one seed? The Plants that produce single-seeded fruits, for instance, avocado and mango oft

Describe prematurity in coronaw artery disease, Describe Prematurity in cor...

Describe Prematurity in coronaw artery disease ? CAD in Indians tends to be more aggressive and manifests at a younger age. Generally CAD occurring before the age of 55 years i

Historical example for scaling from individual to ecosystems, Define Histor...

Define Historical example for scaling from individual to ecosystems? Biological oceanographers have long utilized physiologically based models like the Droop model, which reduc

The chance of fertilisation in humans, Explain why the chance of fertilisat...

Explain why the chance of fertilisation in humans is restricted to only a few days each month. Sperms can fertilise an ovum for up to about three days after entering the female

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