Consider the following statements sympathetic nervous system is characterised by
1. Acetylcholine as neuro secretion
2. Fight of flight activities
3. Longer preganglionic fibres
4. Non-medullated postganglionic fibres
5. Arising from thoracic-lumbar portion

Consider the following statements: The principle of total internal reflection is applicable to explain the 1. Formation of mirage in desert. 2. Formation of image in microscope. 3. Colour of evening sky. 4. Operation of optical fibres. Which of the statement given above are correct?

Consider the following statements and select the correct answer from the code given below: 1. India's population is characterised by a high growth rate. 2. With the current growth rate it is likely to overtake China in the near future. 3. Out of every six persons of the World one is Indian. 4. About 40% of the India's population is below the poverty line level.

Biosphere is a global ecosystem composed of living organisms and abiotic factors from which they derive energy and nutrients. And ecosystem is defined as structural and functional unit of the biosphere comprising of living and non-living environment that interact by means of food chains and chemical cycles resulting in energy flow, biotic diversity and material cycling to form a stable, self-supporting system Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of herbivores. (iii) The length of the food chains is generally limited to 3 – 4 trophic levels due to energy loss (iv) The length of the food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct?

Consider the following statements each with one or two blanks. (i). Towards the centre of the inner concave surface of the kidney is a notch called (1) through which ureters, blood vesels and nerves enter. (ii). The medulla of kidney is divided into a few conical masses called (2) projecting into the (3). (iii). Glomerulus is a tuft of capillaries formed by the (4). artery. Blood from the glomerulus is carried away by an (5) artery. Which one of the following options correctly fills the blanks in any two of the statements?

Consider the following statements each with one or two blanks. (i). Towards the centre of the inner concave surface of the kidney is a notch called (1) through which ureters, blood vesels and nerves enter. (ii). The medulla of kidney is divided into a few conical masses called (2) projecting into the (3). (iii). Glomerulus is a tuft of capillaries formed by the (4). artery. Blood from the glomerulus is carried away by an (5) artery. Which one of the following options correctly fills the blanks in any two of the statements?