NEET Biology Evolution Notes

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Study Material for NEET Biology Evolution

NEET Biology students should refer to the following Pdf for Evolution in NEET. These notes and test paper with questions and answers for NEET Biology will be very useful for exams and help you to score good marks

NEET Biology Evolution

 

While going through the chapter pay special attention to the following –
 
Terms and definitions –
 
1. Coacervate
2. Atavism
3. Biogenetic law
4. Palaeontology
5. Adaptive radiation
6. Homology
7. Parallel evolution
 
Differences –
 
1. Convergent and Divergent evolution
2. Moulds and Casts (Fossils)
3. Abiogenesis and Biogenesis
 
Fossils –
 
1. Archaeopteryx
2. Ostracoderms
3. Trilobites
4. Synapsids
5. Dinosaurs
6. Hyracotherium
 
Biologists –
 
1. A I Oparin
2. Louis Pasteur
3. Aristotle
4. J B S Haldane
5. George H F Nuttal
6. F Redi
7. S L Miller
 
According to Abbe Lemaitre (Belgian cosmologist, 1931) the universe has evolved due to thermonuclear explosion (Big-Bang hypothesis). The term ‘Big-Bang’ was introduced in 1950 by a British Astronomer, Fred Hoyle. All galaxies are constantly moving away from each other. Our galaxy is milky way which is spiral and medium sized. Our solar system has originated by condensation (gravitational contraction) of clouds of cosmic dust and gases. The lithosphere and atmosphere were created earlier and hydrosphere later, when the temperature on earth dropped to <100oC.
 
IMPORTANT THEORIES REGARDING ORIGIN OF LIFE
 
1. Theory of spontaneous creation (Theory of abiogenesis or Autogenesis) – Anaximander, Aristotle and Plato (384 –322 BC)
 
 
According to this theory the organisms develop from the similar forms or from non living matter spontaneously. For example :
(i) Lice develop from human-sweat
(ii) Flies develop from rotten meat.
(iii) Frogs develop from mud/soil
(iv) Snakes develop from dead-man’s hair
 
Van Helmont supported to this theory by stating that if a sweat-wet shirt is kept in dark in a heap of wheat for 21days, the mice will appear. This theory was discarded by 3-scientists, i.e. F. Redi (1668), L. Spallanzani (1765), both Italian, and Louis Pasteur (1861), a French scientist.
 
F. Redi proved that fl ies do not appear from rotten meat if the container is kept covered with a parchment sheet. Only the Jars which are open show the presence of larvae (maggots) of housefl y. He stated that housefl ies develop only from the eggs and not spontaneously.
 
 
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NEET NEET Biology Evolution Study Material

We hope students liked the above Study Material for Evolution designed as per the latest syllabus for NEET Biology released by NEET. Students of NEET should download the Study Material in Pdf format, read the notes and related questions and solutions given in above NEET Biology Study Material on daily basis. All latest Study Material have been developed for Biology by referring to the most important and regularly asked topics which the students should learn and practice to get better score in school tests and examinations. Expert teachers of studiestoday have referred to NCERT book for NEET Biology to develop the Biology NEET Study Material. After solving the questions given in the Study Material which have been developed as per latest course books also refer to the NCERT solutions for NEET Biology designed by our teachers. Also download NEET Biology Sample Papers given on studiestoday. After solving these you should also refer to NEET Biology MCQ Test for the same chapter.

 

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