10th Class Biology Lecture Unit:16 Part:1 (PTB syllabus)

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9th and 10th class English, Biology, Physics, Chemistry, and Computer Science Lectures for Punjab Boards. Class 9th 10th , IX/SSC-1/Matric. These Lectures are per the Latest Syllabus/Course Prescribed by the Boards of Intermediate and Secondary Education (BISEs) of Punjab Province and prescribed by the Department of Education, Punjab Government, Lahore.

In this video,

I covered these things,

Lecture

Unit:16

Part:1

Man and His Environment,

16.1 Levels Of Biological Selection,

16.1.1 Components of Ecosystem,

16.2 Flow Of Materials And Energy In Ecosystem,

1. Pyramid of Numbers,

2. Pyramid of Biomass,

16.2.4 Biogeochemical Cycles,

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