Lifeeasy Biology: Questions and Answers - Recent activity in Plant Growth and Development

Answered: Differentiate between haemolysis and turgidity.

Tue, 13 Feb 2018 22:00:11 +0000

Plasmolysis involves the shrinking of cell when placed in hypertonic solution while haemolysis involves the stretching and bursting of cell when placed in hypotonic solution.

Answered: Differences between plasmolysis and haemolysis?

Wed, 11 Oct 2017 19:49:48 +0000

Plasmolysis occurs in plant cells while haemolysis occurs in red blood cells

Answered: How does a pneumatophore work?

Mon, 05 Jun 2017 21:06:33 +0000

Pneumatophores are spongy outgrowths of roots that facilitate oxygen absorption.
These specialized above-ground root extends above the surface of water are produced by plant growing in water (waterlogged soil)
It allows free exchange of carbon dioxide and oxygen for the root.
Example: Black mangrove

How to calculate RGR and AGR? Could you please explain in a detailed way

Sun, 09 Oct 2016 21:56:16 +0000

I have given a sum on their values in exam that rgr and agr values of a leaf

Answered: what does pedicellate mean

Sat, 10 Sep 2016 20:39:26 +0000

The stalk of an individual flower is called a Pedicel.

A flower with a pedicel is known as a Pedicellate flower.

what is the procedure of breaking sed dormancy by hot water treatment in the laboratory?

Fri, 04 Mar 2016 22:25:57 +0000

Answered: What are the main steps that are involved in the hybridization process?

Mon, 01 Sep 2014 21:54:45 +0000

The main steps of hybridization process are:

Selection of the parents
Evaluation of the parents
Selfing of parents
Emasculation
Bagging
Tagging
Pollination
Harvesting
Threshing
Drying and storage

Answered: What are the limitations of green revolution?

Mon, 01 Sep 2014 21:54:11 +0000

The limitations of the green revolutions are:

The output of the Indian agriculture sometimes falls down and so India has not achieved self-sufficiency.
The high yielding in all crops have not fully developed and has not been extended to all the regions too.
Certain regions of the state only showed the best results.
There are certain places of the state where famine condition still exist.
There are still starving peoples in India.
The green revolution cannot be considered as 100 percent success.

Answered: How the root induction can be done during the callus culture?

Mon, 01 Sep 2014 21:53:34 +0000

The presence of the phytohormone auxins in the callus culture helps in inducing the roots.

Answered: The somatic cell hybrids are produced with the help of

Mon, 01 Sep 2014 21:53:17 +0000

The somatic cell hybrids are produced with the help of poly ethylene glycol.

Answered: What is protein sequencer?

Mon, 01 Sep 2014 21:52:58 +0000

Protein sequencer is a machine that can reveals the sequence of amino acids in a protein.

Answered: What is particle gun?

Mon, 01 Sep 2014 21:52:40 +0000

The particle gun is a machine that can change the genetic makeup of the plant cell there by shooting DNA coated particles to it.

Answered: What is gene synthesizer?

Mon, 01 Sep 2014 21:52:18 +0000

The gene synthesizer is a machine that artificially synthesizes the DNA sequences.

Answered: What is seed dormancy?

Mon, 01 Sep 2014 21:45:13 +0000

The inability of the mature viable seed to germinate under conditions of favorable temperature, moisture, light etc. is known as the seed dormancy or resting stage.

Recategorized: What does the cohesion tension theory propose?

Sun, 20 Jul 2014 20:00:00 +0000

Recategorized: Which solution causes plasmolysis?

Sun, 20 Jul 2014 19:59:25 +0000

Recategorized: When does plasmolysis occur in a plant cell?

Sun, 20 Jul 2014 19:56:49 +0000

Recategorized: Difference between osmosis and plasmolysis?

Sun, 20 Jul 2014 19:56:12 +0000

Recategorized: Difference between plasmolysis and cytolysis?

Sun, 20 Jul 2014 19:55:14 +0000

Recategorized: Difference between plasmolysis and deplasmolysis?

Sun, 20 Jul 2014 19:54:38 +0000

Answered: Why is gravitropism a crucial plant adaptation?

Sat, 07 Jun 2014 21:26:32 +0000

The gravitropism have many important advantages which make them very crucial for the plant growth. It helps the seeds to attain a random orientation in the soil. It also anchors the root system into the soil to attain maximum nutrients and other resources.

Answered: Difference between chlorosis and etiolation?

Sat, 07 Jun 2014 21:26:18 +0000

The chlorosis is the yellowing of the leaves it may be symptoms of some plant disease or infection. This yellowing may be also due to the ageing, deficiency of nutrients, infection of disease, absence of light etc. When these causes are not treated effectively it will result in the death of the plant.

Whereas the etiolation is the condition of the plants when they are exposed to darkness. Under the dark condition the stem of the plant elongates well, the leaves become stunted in growth where yellowing the leaves also occurs due to less manufacturing of the chlorophyll. This condition can be treated when the plant is exposed to sufficient light intensity.

Answered: Why is etiolation important?

Sat, 07 Jun 2014 21:26:03 +0000

Etiolation helps the plants to overcome the dark condition which is unfavorable for the normal growth of the plant.

Answered: Directional gravity sensing in gravitropism?

Sat, 07 Jun 2014 21:25:12 +0000

The gravity sensing in gravitropism is by due to the presence of the organ statocysts. Statocytes are the cells containing the sedimenting starch grains. There is more than one statoliths in the statocyte. Statoliths are the amyloplast which is formed of group of starch grains contained inside a cell membrane. The horizontal position of the root which will cause the displacement of the statoliths in response to the gravity. This results in the change in the potential of the cell membrane. This in turn results in the stimulation and flow of the calcium and auxin towards lower side of the root. The difference in the activity of the auxins between the upper and lower side of the root result in the growth of the root downwards.

Answered: Why is gravitropism important for plants?

Sat, 07 Jun 2014 21:24:36 +0000

Some of the importances of gravitropism are:

It helps the plants to compete for the resource which are limited in the soil.
It helps the seeds to attain a random orientation in the soil.
It helps the root system to anchor and penetrate the soil to attain the enough nutrinets and water.

Answered: What may be a cause of root gravitropism?

Sat, 07 Jun 2014 21:24:03 +0000

The gravitropism of the root is contained in the root cap present at the tip of the root. So gravity perception is one of the functions of the root cap.

Answered: Function of florigen hormone?

Sat, 07 Jun 2014 21:23:48 +0000

The functions of florigen are:

Florigen helps in regulating the growth.
In short day plants florigen acts at the shoot apex and there by induces the flower formation.
In some long day plants florigen helps in the stem elongation and inflorescence formation that is induces the flower formation.

Answered: Where is florigen produced?

Sat, 07 Jun 2014 21:23:22 +0000

The flowering hormone is called florigen. The florigen is produced in the leaves and from there it is translocated to the axillary buds. Then axillary bud is converted into flower bud.

Answered: Intermediate day plants.

Sat, 07 Jun 2014 21:23:08 +0000

The intermediate plants are the plants which flowers when the length of the days falls between that of the long day plants and short day plants. These plants will not flower when the day length is too long or too short. Some of the examples are sugarcane, Coleus etc.

Answered: Etiolation in plants?

Thu, 05 Jun 2014 19:52:22 +0000

The etiolation is the condition of the plants when they are exposed to darkness. Under the dark condition the stem of the plant elongates well, the leaves become stunted in growth where yellowing the leaves also occurs due to less manufacturing of the chlorophyll.

Answered: What happens to plants during etiolation?

Thu, 05 Jun 2014 19:52:11 +0000

During etiolation the plants chlorophyll become less developed or may be absent so that the leaves appears yellowish in colour. Stem usually elongates excessively and leaves of grass seedlings will be rolled towards the mid vein.

Answered: Is etiolation an adaptation?

Thu, 05 Jun 2014 19:51:58 +0000

Yes, etiolation is the adaptation shown by the plants when growing in the darkness.

Answered: Etiolation is caused by

Thu, 05 Jun 2014 19:51:44 +0000

The etiolation is caused by the partial or complete absence of sunlight.

Answered: Short day vs long day plant.

Thu, 05 Jun 2014 19:51:30 +0000

Short day plants are the plants which usually flowers when the length of the day is shorter than a critical length. Whereas the long day plants are that which will flower when the length of the day becomes greater than a critical length.

Answered: Short day plants examples.

Thu, 05 Jun 2014 19:51:05 +0000

Some of the examples of short day plants are Sugar cane, Tobacco, Soybean and Chrysanthemum etc.

Answered: Difference between photoperiodism and phototropism.

Thu, 05 Jun 2014 19:50:14 +0000

Photoperiodism is the response of the plants to the relative length of day and night. The day length is referred as the photoperiod. Whereas phototropism is the movement or bending of the plant towards the source of light.

Answered: Is wheat a short day plant?

Thu, 05 Jun 2014 19:49:57 +0000

No, Wheat is a long day plants.

Answered: Is corn a short day plant?

Thu, 05 Jun 2014 19:49:46 +0000

Yes, Corn is a short day plant.

Answered: Is poinsettia a short day plant?

Thu, 05 Jun 2014 19:49:34 +0000

Yes, Poinsettia is a short day plant.

Answered: Is a rose a short day plant?

Thu, 05 Jun 2014 19:49:18 +0000

No, Rose is a day neutral plant.

Answered: Is sunflower a day neutral plant?

Thu, 05 Jun 2014 19:49:02 +0000

Yes, Sunflower is a day neutral plant.

Answered: What is gravitropism in plants?

Wed, 04 Jun 2014 19:31:26 +0000

The gravitropism is the movement or response of the plants towards or away from the force of gravity by the different parts of the plants. If the plant part shows a positive response towards the force of gravity is known as the positive gravitropism. When the part of the plant shows a negative response towards the force of gravity is known as the negative gravitropism.

Answered: Is gravitropism positive or negative?

Wed, 04 Jun 2014 19:31:14 +0000

The gravitropism may be positive or negative. If the part of the plant shows a positive response towards the force of gravity then it is known as the positive gravitropism. When the plant part a negative response towards the force of gravity then it is referred to as the negative gravitropism.

Answered: Is geotropism the same as gravitropism?

Wed, 04 Jun 2014 19:31:03 +0000

The geotropism is also known as the gravitropism.

Answered: Difference between positive and negative gravitropism?

Wed, 04 Jun 2014 19:30:40 +0000

The positive gravitropism is the movement or response of the plants towards the force of gravity. The growth of root is an example for the positive gravitropism. The primary roots grow towards the force of gravity that is in the downward direction.

Whereas the negative gravitropism is the movement or response of the plant against the force of gravity. The growth of shoot of the plant is an example of negative gravitropism. Here the shoot grows away from the earth that is in the upward direction.

Answered: Difference between phototropism and gravitropism?

Wed, 04 Jun 2014 19:30:26 +0000

Phototropism is the movement or response of the plant towards the force of light. The movement of the shoot system is an example for the phototropism. The gravitropism is the movement or response of the plants towards or away from the force of gravity by the different parts of the plants. The movement of the primary roots towards the force of gravity is an example for the gravitropism.

Answered: Examples of gravitropism in plants?

Wed, 04 Jun 2014 19:30:12 +0000

The growth of primary root in response to the force of gravity is an example of gravitropism.

Answered: Example of negative gravitropism?

Wed, 04 Jun 2014 19:29:59 +0000

The growth of shoot of the plant is an example of negative gravitropism. Here the shoot grows away from the earth that is against the force of gravity or in the upward direction so referred to as the negative gravitropism.

Answered: Who discovered gravitropism?

Wed, 04 Jun 2014 19:29:45 +0000

Charles Darwin has first documented the two types of gravitropism.

Commented: Plant hormone that can delay senescence.

Tue, 29 Oct 2013 19:41:19 +0000

But gibberellin can also delay senescence