Pituitary gland (The master gland)
The endocrine system is made up of tissues or organs (collectively called glands) which secrete a chemical substance called hormone. Hormone is a specialized chemical […]
Sericulture and life cycle of silkworm
Silkworm is beneficial to us as we extract silk from its cocoon. In Nepal, two types of silkworm are reared for the commercial production of […]
Silver and gold (coinage metals)
Silver: Symbol :- Ag Atomic number :- 47 Atomic weight :- 107.88 amu Valency :- 1 Position in the periodic table :- group IA (d-block […]
Mendel’s laws of inheritance
Based on the results obtained from the experiments on pea plant with contrasting characteristics for 8 continuous years, Gregor Johann Mendel formulated the three basic […]
Metals (occurence, properties and uses)
Metals form an important class of elements. They are widely used in our daily life for a large number of purposes. They are the elements […]
Adaptation in animals
Aquatic adaptations in animals: a) Aquatic adaptations in fish They have streamlined body which offers least resistance during locomotion through water. Fins help in locomotion. Pectoral […]
Adaptation in plants
The structural features of living organisms that develop over a period of time to enable them to survive and reproduce in a particular environment is […]
Pressure (Practical applications of liquid pressure)
The pressure given by a force is directly proportional to its magnitude, i.e. Pressure (P) α Force (F) ………………………… (i) Similarly, the pressure given by […]
Some important terminologies in Genetics
Terminologies in Genetics Every living organism produced by sexual method of reproduction resembles its parents and at the same time is different from the parents […]
Chromosomes (Structure, types, functions and disorders)
Chromosomes The nucleus of eukaryotic cells consists of a thin reticulate complex of DNA and proteins (histone), which are not distinctly visible in a non-dividing […]