Rain forests are very dense, relatively warm, wet forests. They are havens for millions of plants and animals. A fores…

Starch and cellulose are two very similar polymers. In fact, they are both made from the same monomer, glucose, and ha…

Watermeal (Wolffia sp.) holds the unique position as the world's smallest flowering plant. Watermeal is a member o…

In an aqueous environment, microscopic animals and plants are collectively known as plankton. Plankton which can do ph…

This is to increase the surface area of the intestine for absorption of the nutrients in the food. The lining of the s…

Excessive ingestion of fluorides during early childhood may damage tooth-forming cells, leading to a defect in the ena…

Butylated hydroxyanisole (BHA) and Butylated hydroxytoluene (BHT) are antioxidants, which keep oil from going off. Oxy…

The two types of cells that exist in nature are prokaryotic and eukaryotic cells. Plant and animal cells both belong t…

The human scalp contains an average of about 100,000 individual hairs, each of which is approximately one-fifth of a m…

Hair develops from the cells of the hair bulb, which divide rapidly. The cells of the hair bulb move upwards as new ce…

A hair is a tube filled with cells and pigment with spaces in between. Normally, the spaces are filled with fluid and …

The human eye sees when light stimulates the sensitive cells on the retina. The retina is made up of ‘rods’ and ‘cones’…

The blind spot of the human eye is where the nerve endings of the photoreceptor cells covering the entire retina join …

It is calcium phosphate, which forms tooth enamel. Like bones, tooth enamel is made from crystals of calcium phosphate…

Only the male cricket makes calls with its familiar chirp. Crickets communicate with each other by making a different s…

DDT stands for Dichloro-diphenyl trichloroethane. It is very effective as an insecticide but is very toxic to fish, s…

Oxygen at 65% is the most abundant and carbon is next at 18.5%. 96.2% of the body weight of a human comes from ‘organi…

Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. Osmos…

The itch that we feel as a wound heals is caused by the growth of new cells underneath the old scab. They form a new l…

When a boy reaches puberty the production of testosterone in his body increases (just as oestrogen production increase…