Biodegradable substances affect the environment by: 1. The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility. 2. The biodegradable substances mainly contain carbon. These substances after decomposRead more
Biodegradable substances affect the environment by:
1. The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility.
2. The biodegradable substances mainly contain carbon. These substances after decomposition release that carbon back into the atmosphere.
Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot. Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganisms intRead more
Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot.
Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganisms into harmless substances are called non biodegradable substances.
Various approaches are required for the conservation of forests. Afforestation is one of the most important approach. Besides this: (a) Deforestation should be banned. (b) People should be made more aware about importance of forests. (c) The protected areas should be managed by local people which woRead more
Various approaches are required for the conservation of forests. Afforestation is one of the most important approach. Besides this:
(a) Deforestation should be banned.
(b) People should be made more aware about importance of forests.
(c) The protected areas should be managed by local people which would be quite efficient.
(d) National parks and sanctuaries should be formed to conserve the biodiversity.
(e) Hunting should be banned and laws should be formulated against hunting.
(f) There should be proper laws for exploitation of forest resources.
We should conserve forests and wildlife because: Various forest products are used as raw materials in industries. Forests provide us various medicines. Forest provide us oxygen, they cause rain fall. Forest prevents soil erosion.
We should conserve forests and wildlife because:
Various forest products are used as raw materials in industries.
Reflex actions are sudden responses. It is involuntary action which does not involve thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking. The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a conRead more
Reflex actions are sudden responses. It is involuntary action which does not involve thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking. The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is known as reflex arc. Reflex arcs are formed in the spinal cord and the information reaches the brain and the brain responses to it.
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.
The cerebellum is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
The cerebellum is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.
A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.
Reflex action is performed by automatically. It is control and coordinated by the spinal cord. It is an involuntary action. Walking is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. Brain instructs and controls the muscles of the leg to for moving. It iRead more
Reflex action is performed by automatically. It is control and coordinated by the spinal cord. It is an involuntary action.
Walking is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. Brain instructs and controls the muscles of the leg to for moving. It is a voluntary action.
Variations are important for species survival because variation causes the organism to overcome extreme situations. Organism species occupy well-defined positions in the ecosystem, utilising their reproductive capacity. Even so, for factors beyond the control of the species, such locations will alteRead more
Variations are important for species survival because variation causes the organism to overcome extreme situations. Organism species occupy well-defined positions in the ecosystem, utilising their reproductive capacity.
Even so, for factors beyond the control of the species, such locations will alter, and can even destroy the entire species. If any differences in all of these species were to be found in a few individuals, they would have a chance of surviving.
Variations can be beneficial or harmful according to the ecological niche of the organism. A variation suitable for the particular niche is selected by nature in evolution. Thus variations are necessary for the survival of the species. Variation is important for the evolution of the species.
For example: A population of heat resistant bacteria in the temperature of the water survives if the temperature of water increases by global warming but most other bacteria would die.
Give any two ways in which biodegradable substances would affect the environment.
Biodegradable substances affect the environment by: 1. The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility. 2. The biodegradable substances mainly contain carbon. These substances after decomposRead more
Biodegradable substances affect the environment by:
See less1. The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility.
2. The biodegradable substances mainly contain carbon. These substances after decomposition release that carbon back into the atmosphere.
Why are some substances biodegradable and some non-biodegradable?
Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot. Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganisms intRead more
Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms and some cannot.
Substances that are broken down into simple soluble forms are called biodegradable substances and the substances that are not decomposed by microorganisms into harmless substances are called non biodegradable substances.
See lessSuggest some approaches towards the conservation of forests.
Various approaches are required for the conservation of forests. Afforestation is one of the most important approach. Besides this: (a) Deforestation should be banned. (b) People should be made more aware about importance of forests. (c) The protected areas should be managed by local people which woRead more
Various approaches are required for the conservation of forests. Afforestation is one of the most important approach. Besides this:
(a) Deforestation should be banned.
(b) People should be made more aware about importance of forests.
(c) The protected areas should be managed by local people which would be quite efficient.
(d) National parks and sanctuaries should be formed to conserve the biodiversity.
(e) Hunting should be banned and laws should be formulated against hunting.
(f) There should be proper laws for exploitation of forest resources.
See lessWhy should we conserve forests and wildlife?
We should conserve forests and wildlife because: Various forest products are used as raw materials in industries. Forests provide us various medicines. Forest provide us oxygen, they cause rain fall. Forest prevents soil erosion.
We should conserve forests and wildlife because:
Various forest products are used as raw materials in industries.
Forests provide us various medicines.
Forest provide us oxygen, they cause rain fall.
Forest prevents soil erosion.
See lessWhat is the role of the brain in reflex action?
Reflex actions are sudden responses. It is involuntary action which does not involve thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking. The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a conRead more
Reflex actions are sudden responses. It is involuntary action which does not involve thinking. For example, when we touch a hot object, we withdraw our hand immediately without thinking. The sensory nerves that detect the heat are connected to the nerves that move the muscles of the hand. Such a connection of detecting the signal from the nerves (input) and responding to it quickly (output) is known as reflex arc. Reflex arcs are formed in the spinal cord and the information reaches the brain and the brain responses to it.
See lessHow do we detect the smell of an agarbatti (incense stick)?
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.
When the smell of the incense stick reaches to our nose then the olfactory receptors present in our nose detects it send this information in fore brain in the form of electrical signals. Fore brain interprets this information as the smell of incense stick where it is already stored.
See lessWhich part of the brain maintains posture and equilibrium of the body?
The cerebellum is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
The cerebellum is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
See lessWhat happens at the synapse between two neurons?
A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.
A synapse is the gap between the two neurons. At synapse the electrical signals converted into chemicals that can easily cross over the gap and pass on to the next neurons where it again converted into electrical signals.
See lessWhat is the difference between a reflex action and walking?
Reflex action is performed by automatically. It is control and coordinated by the spinal cord. It is an involuntary action. Walking is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. Brain instructs and controls the muscles of the leg to for moving. It iRead more
Reflex action is performed by automatically. It is control and coordinated by the spinal cord. It is an involuntary action.
See lessWalking is a reaction to the signal transmitted by the nerve to the muscles. Here, thinking is involved. Brain instructs and controls the muscles of the leg to for moving. It is a voluntary action.
Why is variation beneficial to the species but not necessarily for the individual?
Variations are important for species survival because variation causes the organism to overcome extreme situations. Organism species occupy well-defined positions in the ecosystem, utilising their reproductive capacity. Even so, for factors beyond the control of the species, such locations will alteRead more
Variations are important for species survival because variation causes the organism to overcome extreme situations. Organism species occupy well-defined positions in the ecosystem, utilising their reproductive capacity.
See lessEven so, for factors beyond the control of the species, such locations will alter, and can even destroy the entire species. If any differences in all of these species were to be found in a few individuals, they would have a chance of surviving.
Variations can be beneficial or harmful according to the ecological niche of the organism. A variation suitable for the particular niche is selected by nature in evolution. Thus variations are necessary for the survival of the species. Variation is important for the evolution of the species.
For example: A population of heat resistant bacteria in the temperature of the water survives if the temperature of water increases by global warming but most other bacteria would die.