Biology Book- Grade 12

The Biology Book published by National Book Foundation is approved by Federal Board Pakistan for 12 Grade Students.

The Structure of a Leaf

Every leaf has the same basic structure - a midrib, an edge, veins and a petiole. The main function of a leaf

What are Physical Quantities?

All measurable quantities are called physical quantities such as length, mass, time and temperature. A physical quantity possesses at least two characteristics

Branches of Physics

Branches of Physics are the subjects studied within the scope of physics. Physics can be defined as the branch of science which

Why is the Sun so Bright?

Sun is a star and it is considered the center of the solar system galaxy. The sun is much more than just the gravitational center of our galaxy. In truth, it is the center of life for our world. Every living thing on Earth