Hydro’ means water. Hydrotropism means growth towards water. Materials Required: Seed, A big container, Porous water pot, water and Sand. Procedure: • The tray should be big enough to accommodate the porous pot. • Fill the tray with sand and insert some seeds in it. • Make a pit in the sand and insRead more
Hydro’ means water. Hydrotropism means growth towards water.
Materials Required: Seed, A big container, Porous water pot, water and Sand.
Procedure:
• The tray should be big enough to accommodate the porous pot.
• Fill the tray with sand and insert some seeds in it.
• Make a pit in the sand and insert the porous pot in it.
• Fill the porous pot with water. • Leave the set up for about a week.
Observation:
After a week when seeds are taken out, it is observed that roots grow in the direction of the porous pot. This shows hydrotropic movement in roots.
Auxin is a plant growth hormone. When the tip of the tendril touches a support, then the auxins present on its tip moves to the side of tip which is away from the support, so, due to more auxins in its tendrils away from the support grows faster.
Auxin is a plant growth hormone. When the tip of the tendril touches a support, then the auxins present on its tip moves to the side of tip which is away from the support, so, due to more auxins in its tendrils away from the support grows faster.
The main differences between the movement of the leaves of a sensitive plant and the movement of a shoot towards light are: Movements of leaves of sensitive plants is a nastic movement which does not depend on the direction of stimulus whereas Movement of a shoot towards light is a tropic movement wRead more
The main differences between the movement of the leaves of a sensitive plant and the movement of a shoot towards light are:
Movements of leaves of sensitive plants is a nastic movement which does not depend on the direction of stimulus whereas Movement of a shoot towards light is a tropic movement which depends on the direction of stimulus.
The chemical substances produced in plants which control growth, development and responses in plants, are called plants plant hormones. For example: Auxins, Gibberellins, Cytokinins and Abscisic acid.
The chemical substances produced in plants which control growth, development and responses in plants, are called plants plant hormones.
For example: Auxins, Gibberellins, Cytokinins and Abscisic acid.
Vegetative propagation is practiced for growing some types of plants because of following advantages: 1. It is used to grow a plant in which viable seeds are not formed or very few seeds are produced such as Orange, Banana, Pineapple. 2. It helps to introduce plants in new areas where the seed germiRead more
Vegetative propagation is practiced for growing some types of plants because of following advantages:
1. It is used to grow a plant in which viable seeds are not formed or very few seeds are produced such as Orange, Banana, Pineapple.
2. It helps to introduce plants in new areas where the seed germination fails to produce mature plant due to change in environmental factors and the soil.→ It is more rapid, easier and cheaper method.
3. By this method a good quality of a race or variety can be preserved.
Higher complex organisms cannot give rise to new individuals through regeneration because complex organisms have organ-system level of organization. All the organ systems of their body work together as an interconnected unit. They can regenerate their lost body parts such as skin, muscles, blood, etRead more
Higher complex organisms cannot give rise to new individuals through regeneration because complex organisms have organ-system level of organization. All the organ systems of their body work together as an interconnected unit. They can regenerate their lost body parts such as skin, muscles, blood, etc. However, they cannot give rise to new individuals through regeneration.
DNA copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always taRead more
DNA copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always takes place along with the creation of additional cellular structure. This process is then followed by division of a cell to form two cells.
Advantages of spore formation: 1. Large numbers of spores are produced in one sporangium. 2. Spores are distributed easily by air to far-off places to avoid competition at one place. 3. Spores are covered by thick walls to prevent dehydration under unfavourable conditions.
Advantages of spore formation:
1. Large numbers of spores are produced in one sporangium.
2. Spores are distributed easily by air to far-off places to avoid competition at one place.
3. Spores are covered by thick walls to prevent dehydration under unfavourable conditions.
In binary fission a single cell divides into two equal halves.Amoeba and Bacteria divide by binary fission. In multiple fission, a single cell divides into many daughter cells simultaneously. Plasmodium divide by multiple fission.
In binary fission a single cell divides into two equal halves.Amoeba and Bacteria divide by binary fission.
In multiple fission, a single cell divides into many daughter cells simultaneously. Plasmodium divide by multiple fission.
Design an experiment to demonstrate hydrotropism.
Hydro’ means water. Hydrotropism means growth towards water. Materials Required: Seed, A big container, Porous water pot, water and Sand. Procedure: • The tray should be big enough to accommodate the porous pot. • Fill the tray with sand and insert some seeds in it. • Make a pit in the sand and insRead more
Hydro’ means water. Hydrotropism means growth towards water.
Materials Required: Seed, A big container, Porous water pot, water and Sand.
Procedure:
• The tray should be big enough to accommodate the porous pot.
• Fill the tray with sand and insert some seeds in it.
• Make a pit in the sand and insert the porous pot in it.
• Fill the porous pot with water. • Leave the set up for about a week.
Observation:
See lessAfter a week when seeds are taken out, it is observed that roots grow in the direction of the porous pot. This shows hydrotropic movement in roots.
How do auxins promote the growth of a tendril around a support?
Auxin is a plant growth hormone. When the tip of the tendril touches a support, then the auxins present on its tip moves to the side of tip which is away from the support, so, due to more auxins in its tendrils away from the support grows faster.
Auxin is a plant growth hormone. When the tip of the tendril touches a support, then the auxins present on its tip moves to the side of tip which is away from the support, so, due to more auxins in its tendrils away from the support grows faster.
See lessGive an example of a plant hormone that promotes growth.
Auxin is a plant growth hormone.
Auxin is a plant growth hormone.
See lessHow is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
The main differences between the movement of the leaves of a sensitive plant and the movement of a shoot towards light are: Movements of leaves of sensitive plants is a nastic movement which does not depend on the direction of stimulus whereas Movement of a shoot towards light is a tropic movement wRead more
The main differences between the movement of the leaves of a sensitive plant and the movement of a shoot towards light are:
See lessMovements of leaves of sensitive plants is a nastic movement which does not depend on the direction of stimulus whereas Movement of a shoot towards light is a tropic movement which depends on the direction of stimulus.
What are plant hormones? Name a plant hormone that promotes growth in plants.
The chemical substances produced in plants which control growth, development and responses in plants, are called plants plant hormones. For example: Auxins, Gibberellins, Cytokinins and Abscisic acid.
The chemical substances produced in plants which control growth, development and responses in plants, are called plants plant hormones.
For example: Auxins, Gibberellins, Cytokinins and Abscisic acid.
See lessWhy is vegetative propagation practised for growing some types of plants?
Vegetative propagation is practiced for growing some types of plants because of following advantages: 1. It is used to grow a plant in which viable seeds are not formed or very few seeds are produced such as Orange, Banana, Pineapple. 2. It helps to introduce plants in new areas where the seed germiRead more
Vegetative propagation is practiced for growing some types of plants because of following advantages:
See less1. It is used to grow a plant in which viable seeds are not formed or very few seeds are produced such as Orange, Banana, Pineapple.
2. It helps to introduce plants in new areas where the seed germination fails to produce mature plant due to change in environmental factors and the soil.→ It is more rapid, easier and cheaper method.
3. By this method a good quality of a race or variety can be preserved.
Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?
Higher complex organisms cannot give rise to new individuals through regeneration because complex organisms have organ-system level of organization. All the organ systems of their body work together as an interconnected unit. They can regenerate their lost body parts such as skin, muscles, blood, etRead more
Higher complex organisms cannot give rise to new individuals through regeneration because complex organisms have organ-system level of organization. All the organ systems of their body work together as an interconnected unit. They can regenerate their lost body parts such as skin, muscles, blood, etc. However, they cannot give rise to new individuals through regeneration.
See lessWhy is DNA copying an essential part of the process of reproduction?
DNA copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always taRead more
DNA copying is an essential part of reproduction as it passes genetic information from parents to offspring. It determines the body design of an individual. The reproducing cells produce a copy of their DNA through some chemical reactions and result in two copies of DNA. The copying of DNA always takes place along with the creation of additional cellular structure. This process is then followed by division of a cell to form two cells.
See lessHow will an organism be benefited if it reproduces through spores?
Advantages of spore formation: 1. Large numbers of spores are produced in one sporangium. 2. Spores are distributed easily by air to far-off places to avoid competition at one place. 3. Spores are covered by thick walls to prevent dehydration under unfavourable conditions.
Advantages of spore formation:
See less1. Large numbers of spores are produced in one sporangium.
2. Spores are distributed easily by air to far-off places to avoid competition at one place.
3. Spores are covered by thick walls to prevent dehydration under unfavourable conditions.
How does binary fission differ from multiple fission?
In binary fission a single cell divides into two equal halves.Amoeba and Bacteria divide by binary fission. In multiple fission, a single cell divides into many daughter cells simultaneously. Plasmodium divide by multiple fission.
In binary fission a single cell divides into two equal halves.Amoeba and Bacteria divide by binary fission.
See lessIn multiple fission, a single cell divides into many daughter cells simultaneously. Plasmodium divide by multiple fission.