Generally the food chain has how many trophic levels?
1). One
2). Two
3). Three
4). Three or four
The cells constituting walls of the blood capillaries are known as
1). Parietal cells
2). Haemocytes
3). Oxyntic cells
4). Endothelial cells
Function of glomerulus in mammalian kidney is
1). Rebsorption of salts
2). Urine formation through blood filtration
3). Urine collection
4). All of the above
The actively dividing layer of columnar cells in the epidermis of man is called as the
1). Stratum granulosum
2). Stratum lucidum
3). Stratum malpighi
4). Stratum comeum
Which is the most stable ecosystem?
1). Desert
2). Mountain
3). Ocean
4). Forest