BIOLOGY

A bone is strong, hard and tough connective tissue mainly made of calcified material. Composition of bone A fully developed bone is hard and brittle. Bones can break, and a ...

Muscles can be referred to simply as the flesh mostly associated with bones to give shape to the bodies of animals. The flesh may be red in the case of ...

Transpiration is the loss of water vapour from different parts of the plant shoot. These parts include the stomata of leaves, the cuticle of both leaves and young stems, and ...

Fish and tadpoles are aquatic vertebrates. They possess gills for gaseous exchange. Gills of fish Fish has four gills on each side of the head. Each gill has two rows ...

Planaria is a free-living, flat, slender and small worm. The digestive tract consists of a ventrally placed mouth, muscular pharynx and intestine. The pharynx can be protruded from the mouth ...

This is the response of plant parts to the stimulus of gravity. Plant shoots grow away from gravity of the earth and are said to be negatively geotropic. Roots grow ...

The eyes are the organs of sight in the higher invertebrates and all vertebrates. They (eyes) are equipped with photo receptors (rods and cones) to detect light. Most of these ...

There are no special excretory organs or systems in plants. The plants as living things do carry out excretion. Elimination of certain waste takes place through the stomata and lenticels ...

The oxygen needed to oxidize lactic acid to pyruvic acid and from pyruvic acid to carbon oxide, water and chemical energy is called Oxygen debt. The quick heavy breathing to ...

Translocation is the transport of manufactured food substances from the leaves to all parts of the plant. The movement is usually described as downwards from the leaves to the roots ...