Animal Hormones and Their Secretion
Control and Coordination in animals are performed by the activities of different types of chemical substances. These chemical substances are known as Animal Hormones.
Enviroment
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Dangerous Impact of Breaking of Mountains
Landslides are very common in rainy season. Rains caused serious conditions during previous some weeks this year in many villages of Maharashtra. Many of these villages that were located in the laps of mountains vanished within no time.
Different Plant- Movements
The positive movements of a plant shoot in response to light or movement of shoot towards the source of light is called as Phototropism. If the part of a plant moves away from light, this movement is called as Negative Phototropism.
Plant Movements
Growth and movements in plants occur due to internal and external factors. Plant hormones are internal factors while light, touch, gravity and other stimuli are external factors that affect plant growth and movements.
Coordination in plants
Auxins move to darker side of the part of a plant and cause cells of that side to grow larger. These may induce cell division as well. In both of these cases the part of the plant bends.
Our Central and Peripheral Nervous Systems
Brain and Spinal cord together constitute the Nervous System. The nervous system receives information in the form of impulses from all parts of the body and integrates this information.
Impulses and their conduction
The information received by a receptor at the end of a dendrite sets of a chemical reaction that creates an electric impulse.
Nervous System of Animals
Most of the animals have a network of very fine filamentous or threadlike structures which exchanges information. These structures are called as nerves.
Control and Coordination in Living Beings
It is now a general opinion that if we see something moving, it is alive.
Natural Resources and Their Types
Natural resources constitute both living and non-living resources. Non-living resources are renewable and non-renewable.
Landfilling and Incineration
Land-filling is the process of disposing solid waste in low lands or into trenches through proper sanitary methods. It involves- collection, transport, compaction, etc. processes along with proper management for gas-outlet etc. For land filling, the important thing to be taken into account is the distance of waste collection site to the waste dumping site, because it involves cost of transportation.
