NEW SYSTEM OF CLASSIFICATION
The modern classification system based on physiology, biochemistry and embryology have revealed distinct similarities between living organisms which external appearances of organisms will not show or discover. Not all biologists ...
ALIMENTARY CANAL OF COCKROACH
Cockroach is an omnivorous animal eating anything ranging from starchy and sweet things to papers, clothes etc. Its alimentary canal is therefore adapted to suit its type of diet. The ...
MOVEMENTS IN HYDRA AND EARTHWORM
Movements in Hydra 1) Swaying Sometimes Hydra comes to rest on rock or other suitable hard surface in water and fixes itself temporarily with mucus substances at the basal disc ...
FIRST AID IN HAEMORRHAGE
Haemorrhage (bleeding) is the coming out of blood from the blood vessels which have been damaged. When the loss of blood is to the outside, it is called external haemorrhage ...
POLLINATION IN PLANTS
Pollination is defined as the transfer of mature pollen grains from the anthers of one flower to the mature stigma of the same flower or another flower of the same ...
FERTILIZATION IN FLOWERING PLANTS
Immediately after pollination, fertilization follows. Fertilization is the union of male and female gametes to form a zygote. In a flower, the male gametes develop from the pollen grains while ...
SHOOT SYSTEM
This is the part of the plant which grows above the soil except the modified aerial roots. The shoot system consists of two main organs - the stem and the ...
ROOT SYSTEM
The root system is the part of the plant growing in the soil. This excludes the underground stems which are organs of perennation (survival from year to year by vegetative ...
EXTERNAL FEATURES OF FLOWERING PLANTS
The flowering plants form a group of plants known as Angiosperms. They are characterized by the possession of flowers for sexual reproduction. They bear flowers in their various breeding seasons ...