Category: NEB Biology Notes

Basidiomycetes General characteristics of Basidiomycetes: Members of it occur as saprophytes or parasites.Mycelium is well developed, branched and septate. It possesses a minute pore in the center and is known...

General account , structure and functions of bacterial cells Anton Von Leeuwenhoek is regarded as “ father of bacteriology” because he first time (1683) observed these tiny ‘animalcules’ from the scum of...

Evolution - Biology Notes Grade XI Evolution is the gradual continuous , irreversible process of change and development of simple and primitive things to complex and organized things. Charles darwin...

Ascomycetes General characteristics of ascomycetes Members of the ascomycetes occur as saprophytes or parasites.Mycelium is well developed and branched except yeasts (unicellular).The species of it are called Sac fungi because...

Fungi Meaning Fungi are nucleated, spore bearing, non- vascular and achlorophyllous organism which generally reproduces asexually and sexually. Fungi are large group of achlorophyllous organism organisms show parasitic saprophytic or...

Zygomycetes - Biology Notes General characteristics of Zygomycetes The group is named zygomycetes because of the formation of diploid resting spore called zygospore.They are mostly saprophytic and some are parasites...

BRYOPHYTA BIOLOGY NOTES Bryophyta is a group of higher cryptogams in which the plant body may be thalloid(primitive forms) or leafy (advanced forms). They may develop some root like structures...

Virus (unique organism) Viruses are the submicroscopic nucleoproteins entitle which reproduce inside the living host. According to Bawden (1943), the virus is an obligatory parasite pathogens having diameter of less...

PTERIDOPHYTA Biology Notes Class 11 Pteridophyta are also called vascular cryptogams because among the cryptogams the vascular strands are present only in pteridophytes. They are most primitive among the vascular...

GYMNOSPERM NEB BIOLOGY Gymnosperm are the naked seeded plant i.e. seeds are not enclosed by definite covering. The plant body is sporophyte and is differentiated into roots, stem and leaves....

Flora diversity of Nepal Nepal contains a wide range of habitats with diverse floral species, due to its topographic and climate extremities. Collection of Nepali specimens was initiated in 1802...

NEB Biology Notes Definition and scope of biodiversity The richness and variety of living beings i.e. flora and fauna in any location is termed as biodiversity. It is short form...

Lamarckism Lamarck was the great biologist and taxonomist. He was the first scientist to put forward the theory of organic evolution, this theory was published in a book philosophic zoolgique....

Nostoc - NEB Biology Class 11 NEB Biology Class 11 Division : Thallophyta Class      : Cyanophyceae Order    : Nostocales Family   : NostocaceaeGenus   : Nostoc Nostoc is a colonial prokaryotic cynophycean or BGA , found in...

Origin of Life on Earth According to Nebular hypothesis about 10000 to 20000 millions of years ago . There was a huge mass of highly condensed cosmic material. It exploded...

Algae are chlorophyll bearing organism with a thalloid plant body and they are the simplest of all multicellular green plants. The branch of science which deals the study of algae...

Neo - Darwinism There have been modern changes in the theory of natural selection. These changes were made necessary by the discovery of Mendal’s law of heredity in 1900 and...

Darwinism NEB XI In 1859, Darwin published his book the origin of species:Darwinism can be described as follows : Over production of offspring According to Darwinism population tend to multiply...