BIOLOGY

The mammalian gametes are male gametes called sperm or spermatozoa (singular = spermato-zoon), while the female gametes are called eggs or ova (singular = ovum) The reproductive sex cells are ...

Germination is a process by which the embryo of a seed grows out of its testa and develops into a seedling. In other words, Germination is the series of changes ...

Parturition (labour) is the expulsion of the foetus, placenta and foetal membranes from the uterus. After about 270-280 days in the uterus, the foetus is now prepared to come to ...

When the embryo has been implanted, it produces four extraembryonic membranes (membranes outside the body of the embryo namely: amnion, chorion, allantois and yolk sac). Since these membranes are located ...

The liver is the largest gland in the body. It is dark-red, spongy and lobed. The lobes are: caudate lobe, left lobe, right lobe and median lobe. It is hung ...

The stomach is a thick-walled large muscular sac which lies in the left portion of the abdominal cavity below the diaphragm. It is made of three layers of muscles arranged ...

Experiment 1 Aim: To demostrate the action of ptyalin (saliva) on cooked starch. Method: Some saliva is introduced into a test tube X and diluted with little amount of water ...

Genetic traits are determined by genes located on the chromosomes. The sex of an organism is a genetic trait which like other traits is transmitted from parent to offspring during ...

A fracture is any break in a bone. There are two kinds of fracture namely simple (closed) and compound (open). Simple or closed fracture If the broken bone does not ...

Neurones are specialized cells that transmit impulses (messages) around the body in form of electrical charges. The nervous system consists of millions of neurones (nerve cell). Three main types exist ...