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Why do leaves change color?
Leave is the food factories of plants. During the spring and summer, leaves are actively making food and they are filled with chlorophyll, which gives green color.
As summer, ends and the days get shorter and cooler, food production stops and the leaves stop producing food. The chlorophyll disappears and they start to change into the yellows, oranges, and reds that we see in autumn.
how is urea formed in the human body?
Feeding on Liquids Animals feeding on liquids are generally highly specialised for their feeding habits. Certain protozoa, endoparasites and aquatic invertebrates take up nut
Three charges are at the corners of an equilateral triangle, as shown in the figure below. Calculate the electric field at a point midway between the two charges on the x-axis. (Le
At a biotechnologist, employment opportunities can be found in many areas. In addition to biotechnology companies, where can a scientist with a biotechnology background find employ
Define the term- Ultrafiltration Ultrafiltration occurs when the flow of a substance across a cell membrane is increased by a hydrostatic pressure. This process was initially b
Pollen Stigma Interaction - Stigma The Stigma After landing on the stigma pollen grain germinates, and produces a pollen tube that carries the male gametes. The stigma has bee
What is Deletion of cell? A deletion is simply when a tip or fragment of a chromosome breaks off and fails to reattach itself to the chromosome from which it came. The gene, or
Material Basis of Primitive Life: In the primitive society, human beings invented tools for catching animals, and for collecting, transporting and even preparing food. They l
Theor y of Epigenesis (i) It was proposed by C.F. Wolff & supported by Von Baer. (ii) Wolff proposed that germ cells contain definite but undifferentiated
What is Class Gastropoda in animal kingdom? Snails and slugs are referred to as gastropods because of their characteristic body plan. "Gastro" is derived from the Greek word fo
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