This is a pea sized major endocrine gland. It is protected by a boney cavity called Sella turcica of the sphenoid bone. It is a protrusion of bottom of Hypothalamus at the base of the brain. This gland is also called as Hypothesis.
Control and Coordination in animals are performed by the activities of different types of chemical substances. These chemical substances are known as Animal Hormones.
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.
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.
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.
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.
The information received by a receptor at the end of a dendrite sets of a chemical reaction that creates an electric impulse.
Most of the animals have a network of very fine filamentous or threadlike structures which exchanges information. These structures are called as nerves.
It is now a general opinion that if we see something moving, it is alive.
Well, I am going to talk about a tree waiting to be cut down for the sake of opening the fifteenth gate of a Stadium, or for the sake of urban development.
A Pesticide is a chemical substance of natural or synthetic origin. It is applied in different forms to kill pests. Pests are living organisms that tend to harm humans, their crops and animals or have a tendency to disturb general household and living conditions. Some organisms can also be applied to kill pests. These organisms are called as biopesticides. On the other hand, pesticides that are synthesized in factories are called as synthetic pesticides.
