In Economic Importance Animals can be Divided into Two Groups
On the basis of economic importance animals can be divided into two main groups: Beneficial animals: There are many worms, insects, birds and beasts in…
Biology
Short Description of Diversification or Bio-diversity
Due to diversification among the animals, the zoologists have categorized the animal kingdom into the following criterions: 1. On the Basis of Shape and Size:…
Animal Diversity
Innumerable small and large plants and animals live in harmony in the diverse geographical, environment and climatic conditions of the world. Organisms of the same…
Dicotyledonous or Dicot Plants
Dicot plants bear two cotyledons in their seeds. The root system. is Tap Root System; leaves are with reticulate venation, flowers are Tetramerous or Pentamerous.…
Monocotyledonous or Monocot Plants
Monocot plants bear one cotyledon in their seeds. Their roots are fibrous, leaves have parallel venation; flo:vers are trimerous (each floral parts being 3 in…
Gymnosperm
Gymnosperms produce flowers and seeds but do not bear any fruit. Once they were well spread around the world but at present their, the number…
Pteridophyta
Pteridophyta is the first vascular plant (which Possesses vascular tissues). The number of species of pteridophyte is about 10,000 species. As a representative of Pteridophyta,…
Bryophyta
There are about 23,000 species of Bryophyta in the world, of which Mosses constitute a major portion of this group. Mosses grow abundantly in Bangladesh.…
Fungi
Fungi (Sing: Fungus) are non-green; there are no photosynthetic pigments in their body. They depend on dead organic substances or other living bodies for their…
Description of Spirogyra
Spirogyra is any of a genus of freshwater green algae with spiral chloroplasts. It measures around 10 to 100μm in size and might stretch centimeters…
Load More