Page 1 - Lesson notes- Living world

TERMS REVISION

1. Diversity : Large variety of anything.
2. Biodiversity : Large variety of organisms.
3. Nomenclature: Scientific naming of organisms.
4. Identification : Correct description of organism prior to nomenclature.
5. Classification : Grouping of organisms in to categories on the basis of
similarities & differences.
6. Taxon : Concrete biological object or category of classification.
1. Taxonomy : Process of classification of organisms.
2. Systematics : branch of biology dealing with taxonomy along with
evolutionary relationship between organisms.
3. Species : Group of Individual organisms with fundamental
similarities (with capacity if sexually reproducing).

LE ARNING TIPS

1. Concentrate on minute points of the chapter keeping very short answer&
short answer type questions in mind.
2. Emphasise on concepts.

LET US LEARN THE LESSON

What is Living?

-Objects having characteristics of cellular
organisation,growth,reproduction,ability to sense environment & give response,
metabolism etc.

All organisms grow:

-Increase in mass or number of cells characterise growth.
-plants grow throughout life.
-Animals grow to certain age .
-Non living objects also grow externally by accumulation of material on
surface.
-Living objects grow from inside.
-Growth cannot be considered as defining property of living beings.
NB : There are certain examples in which mass is decreased during growth eg.
Germinating potato tuber.

Reproduction: