summer assignment for class 12

1. Maharaja agarsain public school
Biology,Assignment
Class-XII
1. Which period is called “Age of Reptiles”. [1]
2. Name the speciesof humanbeingswhichismostcloselyrelatedtomodernman.[1]
3. What is “Founder’seffect”?[1]
4. A chimpanzee canholdobjectsbyitshand& an elephantbytrunk.Are these organsAnalogousor
homologous?[2]
5. Differentiate betweenconvergent&divergentevolution?[2]
6 Bringout differencesbetweenDe Vrie’smutationsandDarwinianVariations?[2]
7. State inwhat waysStanleymillersimulatedthe conditionof :- i) Primitive atmosphere onearth.ii)
Energysource at the time of originof life .iii) Formationof organicmolecule of life.[3]
8. What is Biogeography?HowDarwin’sfinchesprovide biogeographical evidenceinfavourof
evolution.[3]
9. Howdid louispasteursuccessfullydemolishthe populartheoryof spontaneousgeneration?[3]
1 0. Studythe figuresgivenbelow&answerthe followingquestion
. i) Under the influenceof whichtype of natural selectionwouldgraph(a) become like graph(b).ii )
What couldbe the likelyreasonof newvariationsarisinginapopulation.iii) Whosuggestednatural
selectionasmechanismof evolution?[3]

2. 11.When andwhere doesHomohabalisfirstseenonearth?(2)
12.What are the factorsresponsibleforevolutionasperhardyWeinbergprinciple?
13.What isadaptive radition?Howisitrelatedtoconvergentevolution?
14.Explainindustrial melanism?
15.What providedenergyforabioticsynthesisonprimitive earth?[1]
16. Who showedthatlife comesfrompre-existinglife?[1]
17. What ismeantby Gene pool?[1]
18. If you discoveredafossil birdwithscalesonthe body&teethinthe beak.
19. What isspeciation?Listanytwoeventsthatleadto speciation?[2]
20. Trace the importanteventsorstagesof human development?[3]