NEET Biological Exam Questions & Answers 2024/2025
Classification - ANSWERSIt is the arrangement of living organisms into groups created on the basis of similarities and dismilarities
Car von Linneaus - ANSWERSConsidered as the father of taxonomy
- also classified living organisms into two...
Classification - ANSWERSIt is the arrangement of living organisms into groups created on the basis of
similarities and dismilarities
Car von Linneaus - ANSWERSConsidered as the father of taxonomy
- also classified living organisms into two kingdoms
- Plantae and Animalia
Artificial system - ANSWERSincludes only one or few morphological (external) features to classify
organisms - such as floral parts
- sexual sys. of classification
Natural System - ANSWERSinclude as many morpholigical characteristics as possible at the time of
collection. It accounts for both external and internal obersvable features in relation to phylogeny. Thus a
it indicates a natural evolutionary relationship.
-Bentham and Hooker's class. of plants
Phylogenetic system - ANSWERSmainly takes into account the phylogenetic or evolutionary
traits/relationships
-Engler and Prantl's
-John Hutchinson (the families of flowering plants)
- Dobzhansky and Mayr (animals)
Two Kingdom classification - ANSWERSLinneaus classified all organism as plants or animals based on the
presence of cell wall.
Three Kingdom classification - ANSWERSHaeckel; 1866 - organisms were classified into plants, animals or
protista on the basis of lack of tissue differentiation.
, Four Kingdom classification - ANSWERSCopeland; 1956 -
1. Monera: prokaryotes
2. Protista: true nucleate unicellular org.
3. Plantae: photosynthetic and multi cellular
4. Animalia: having non-photosynthetic and multi cellular
Five Kingdom classification - ANSWERSRH Whittaker; 1969 - classified all organisms on the basis of
- complexity of body structure (eukar/prokar)
- complexity of cell structure (unicellular/multi)
- mode of nutrition (autotrophic/heterotrophic)
- ecological life-style (producers, consumers)
- phylogenetic relationships
Six Kingdom classificaiton - ANSWERS(1990); Carl Woese, O Kandler, ML Wheelis proposed their system
based on recent nucleic acid hybridisation and rRNA sequencing method
- Monera
- Archaebacteria
- Eubacteria (true bacteria)
- Protista
- Fungi
- Plantae
- Animalia
Archaebacteria - ANSWERS- prokaryotic and unicellular
- DNA associated w/ some proteins on chromosome + introns are present
- no nuclear envelope, membrane-bound organelles, or chloroplasts
- non-cellulosic cell wall; diff. from eubacteria
- conjunction, transformation, transduction
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