Why Earthworms Are a Gardener’s Best Friend
Earthworms are considered a gardener’s best friend for several reasons: Soil aeration: Earthworms burrow through the soil, creating tunnels and air pockets that allow air,…
Read Article →
Category
O level biology
Plasma membrane
Delimiting membrane or boundary of all cells providing the characteristic shape to the cell. Structure ● Composed of approx. 7 nm thick phospholipid bilayer with…
Read Article →
Mutation
Mutation is a change in the DNA sequence of an organism’s genetic material. DNA, or deoxyribonucleic acid, is the molecule that carries the genetic instructions…
Read Article →
Chromosome
A chromosome is a structure found in cells that is made up of a long strand of DNA, which is the genetic material that contains…
Read Article →
Sir Alexander Fleming
(August 6 , 1881 – March 11, 1955) Early life and Education Sir Alexander Fleming was a Scottish physician, microbiologist, and pharmacologist, who was born…
Read Article →
Diffusion – Movement of Substances
Table of Contents Diffusion Defination Diffusion is the net movement of molecules and ions from a region of their higher concentration to a region of…
Read Article →
Blood vessels and their functions
Arteries are blood vessels which carry blood away from the heart. They have thick, muscular and elastic walls that can withstand the surge of the high-pressure blood pumped out of the heart.
Read Article →