CSIR JRF NET Life Sciences June 2018 Model Question Paper (Mock Test 13) NET Life Sciences Old Papers NET Life Sciences Mock Test Welcome to NET Life Sciences (CSIR Mock Test 13) This Mock Test consists of 15 questions in MCQ format. At the end of the mock test, you have to click on the 'SUBMIT' button to see your Score and the Correct Answers. Please click on the 'NEXT' button to Start the Mock Test... 1. Which one of the following statement is NOT true for the edge effect of two ecosystems? Moving corridors are always harmful It has its distinct physical environment differing from both sides It has different species composition as compared to both sides It has high biodiversity2. The special roots termed pneumatophores are present in: Epiphytes Mangroves Salt stress Parasites3. In the ecosystem, the concept of entropy is used to explain: Population growth Photosynthesis efficiency Competition Energy flow in the trophic level4. The efficiency of ATP synthesis is 40 % and enthalpy of the reaction ADP+iP ⇋ ATP is 8 K cal. If an individual consumes 2000 K cal, then the net ATP production from it would be 40 250 100 10005. Extensive phyletic diversification of animals was observed in Silurian period Mesozoic period Cambrian period Devonian period6. Pearl oysters are obtained from the genus Pinctada Pila Oysteria Mytilus7. Chlorinated hydrocarbons effects ecosystem by Biomagnifications Bioaccumulation Bioconcentration Bioremediation8. Temperature sensitive mutation are important in molecular biology because it helps in studying Genes necessary for the survival of the cell Genes required for development Genes for heat stress Genes for cold stress9. The first cell to be differentiated in the developing embryo is: RBC Nerve cells Epithelial cells Rods10. The rate of reaction for the first-order reaction for a radioisotope is 6.93 X 10-2 sec-1. What is the half-life of the radioisotope? 1000 seconds 10 seconds 100 seconds 0 seconds 11. In habitat ‘A’ pike cichlid fishes preferentially feeds on large adult guppies, so the guppies mature later and are of small size while in habitat ‘B’ killer fish feeds on small, juvenile guppies so here guppies mature early and are large sized. What will be the effect, if experimentally guppies for habitat ‘A’ are transferred to habitat ‘B’. Mature late but large size adults No change would be seen Mature early but large size adults Mature late but small size adult12. Which of the following vaccine does not provide lifetime protection? Polio Tetanus Typhoid Smallpox13. Natural selection against extreme phenotype is termed as Stabilizing selection Diversifying selection Disruptive selection Directional selection14. The type of sieve tube plastids in the order Caryophyllales is: Type-IIP Type-A Type-III P Type-C 15. Morphologically similar species on interbreeding produced viable fertile offspring. They are considered as single species according to: Genetic species concept Morphological species concept Biological species concept Evolutionary species conceptYou have reached at the End of this Mock Test. Please Click 'SUBMIT' button to see your Score and the Correct Answers... More Online Mock Tests… Please follow the links below… CSIR JRF NETICMR JRFDBT BET JRFGATE - BTGATE XL Bioche.GATE XL Micro.GATE XL BotanyGATE XL ZoologyGATE XL Food Tec.GATE EY EcologyIIT JAM - BTIIT JAM - BLGS - BiologySET - BotanySET - ZoologyNEET Get our Updates on CSIR NET Life Sciences in your E-mail Inbox We will not spam your account… Enter your e-mail address Don’t forget to Activate your Subscription…. Please See Your E-Mail… Browse more in Easy Biology Class… Lecture NotesBiology PPTVideo TutorialsBiology MCQQuestion BankDifference betweenPractical AidsMock Tests (MCQ)Biology Exams If you like this post, Please COMMENT . . . . (below ↓) Please Share with your Friends, Relatives, Students and Colleagues… No related posts. Posted in CSIR / ICMR / DBT / ICAR, CSIR NET Mock Test, CSIR NET Model Questions, Mock (Practice) Tests and tagged CSIR JRf NET Life Sciences Mock Test 13, NET Life Sciences Mock Test, NET Life Sciences Model Questions, NET Life Sciences Practice Questions.