regulation d requirements

Nervous Regulation - The heart is regulated to a large extent through the central nervous system. The heart nerve branches from the vagus nerve from the medulla oblongata and the sympathetic nerve fibres from the spinal cord. The vagus nerves are cardiac inhibitory nerves. When ..

Different living organisms tide over very low or very high temperature conditions differently. For E.g., i) Encystment It involves the formation of a hard and chitinous protective coat called cyst, around the body. It is commonly seen in amoeba, euglena. ii) Hibernation (winter sleep) Some animals ..

Role Of Hormones As Messengers And Regulators - Hormones are informational molecules. They are secreted in response to changes in the environment inside or outside the body. These are released into the extracellular fluid, where they are diffused into the blood stream. The latter carries ..

>The repressor protein binds with the operate gene, RNA polymerase cannot be allowed and hence structural genes get switched off. The repressor protein is kept in an active state by the inducer which is usually the substrate molecule. The repressible operon has the same components as in inducible o..

Gibberellins have been shown to be effective in breaking the dormancy in potato tubers and in tree buds in winter. Cytokinins have been found to be effective in breaking the dormancy of seeds. They also promote the germination of the seeds. The cytokinins substitute the red light requirement..

The scatter plot represents the requirement of Vitamin D by a person at various stages in his or her life. Find the number of milligrams of Vitamin D that a 50 year old person requires. => 10 or 2 or 14 or 6..

The scatter plot represents the requirement of Vitamin D at various stages in a person's life. What is the difference between the vitamin D requirement of a 10 year old person and that of a 60 year old person? => 7 or 9 or 10 or 8..

A line AB and a point O. We are required to reflect AB through O. (i) Join AO and produce it to A', so that AO = A'O. (ii) Similarly, join BO and produce it to B', so that BO = B'O. (iii) Join A'B'. Then A'B' is the image of AB in ..

Jim's family required scuba equipment when they were on a vacation. The rent for the equipment was about $120 per day. Which of the following rules represents the relationship between the number of days rented and the rent to be paid? => Rent to be paid = $120 - Number of days rente..

It has been seen that energy change occurring during the reaction at constant temperature and constant volume is given by internal energy change. However, most of the reactions in the laboratory are carried out in open beakers or test tubes, etc. In such cases, the reacting system is open to atmosp..