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Starting with chapter 1 LIVING WORLD
Metabolism, irritability/ consciousness and cellular organization are defining features of the living organism.
GROWTH
Increase in mass or overall size of an tissue is called growth.
Growth is irreversible
Increase in mass and number of cells are twin characters of growth which means if mass increases then the no. of cells will increase too and vice versa
THERE ARE SEVERAL TYPES OF GROWTH, THEY ARE.....
INDETERMINANT DETERMINANT
(unlimited) (limited)
e.g PLANT e.g HUMANS
LOCALIZED DIFFUSED
Growth of a specific part All over growth
e.g PLANTS e.g HUMANS
INTRINSIC EXTRINSIC
growth is internal growth is external
only by living organisms may be shown by non living things
defining feature
e.g PLANTS AND ANIMALS e.g SAND DUNES
In unicellular organisms, growth and reproduction are the same thing
REPRODUCTION
In unicellular organisms, the chance of identical, is 100%. whereas,
Multicellular organism has 99% of chance. this is due to rariation --->sexual ---> evolution
TYPES OF REPRODUCTION
ASEXUAL SEXUAL
Only one parent Two parents
No fusion of gametes fusion of gametes
no variation variation is seen
no gamete formation gamete formation takes place
Types of Asexual reproduction Sexual reproduction
*Spore formation: Algae and Fungi { .(2n) ---->[meiosis] : : (n)}
*Budding: Hydra and Yeast . .
*Fragmentation: Spyrogyra (plants) V
*True Regeneration: Planaria (animals) : (2n)
*Regeneration: Lizard and Starfish
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BIOLOGY NEET NOTES
Teen FictionNEET NOTES FOR BIOLOGY WHICH WOULD HELP YOU TO REVISE
