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. Extensive phyletic diversification of animals was observed in Devonian period Cambrian period Silurian period Mesozoic period2. The first cell to be differentiated in the developing embryo is: Rods Epithelial cells Nerve cells RBC3. Which of the following vaccine does not provide lifetime protection? Polio Tetanus Typhoid Smallpox4. 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 early but large size adults Mature late but small size adult No change would be seen Mature late but large size adults5. The type of sieve tube plastids in the order Caryophyllales is: Type-A Type-III P Type-C Type-IIP6. 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 250 40 1000 1007. Natural selection against extreme phenotype is termed as Diversifying selection Directional selection Disruptive selection Stabilizing selection8. Temperature sensitive mutation are important in molecular biology because it helps in studying Genes necessary for the survival of the cell Genes for cold stress Genes for heat stress Genes required for development9. In the ecosystem, the concept of entropy is used to explain: Competition Energy flow in the trophic level Population growth Photosynthesis efficiency10. Which one of the following statement is NOT true for the edge effect of two ecosystems? It has high biodiversity It has its distinct physical environment differing from both sides Moving corridors are always harmful It has different species composition as compared to both sides11. The special roots termed pneumatophores are present in: Parasites Mangroves Salt stress Epiphytes12. 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? 0 seconds 10 seconds 1000 seconds 100 seconds13. Morphologically similar species on interbreeding produced viable fertile offspring. They are considered as single species according to: Morphological species concept Biological species concept Evolutionary species concept Genetic species concept14. Chlorinated hydrocarbons effects ecosystem by Bioaccumulation Bioremediation Biomagnifications Bioconcentration15. Pearl oysters are obtained from the genus Oysteria Pinctada Pila MytilusYou 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.