Part – A: I. Select the correct alternative from the choices given below: 1 x 15 = 15 1. Haploid conditionis not observed in which of the following cells a) Synergids and Egg b) Zygote and PEN c) Antipodal and Egg d) Antipodal and Synergids
2. Statement I: Formation of fruit without fertilization is called apomixis Statement II: In some species of Asteraceae and grasses seeds are formed without fertilization a) Both Statement I and Statement II are correct b) Both Statement I and Statement II are incorrect c) Statement I is correct and Statement II is incorrect d) Statement I is incorrect and Statement II is correct
3. During gestation the foetus develops limbs and digits by the end a) First month b) Second month c) Third month d) Fifth month
4. The secondary oocyte after ovulation is covered by a non-cellular layer of a) Cumulus oophorus b) Corona radiata c) Zona pellucida d) Cortical layer
5. An example of hormone releasing IUD among the following a) Cu – 7 b) Lippes loop c) LNG – 20 d) Multiload 375
6. Which of the following is a foetal sex determination test? a) ZIFT b) GIFT c) MTP d) Amniocentesis
7. Which of the following Mendelian gene disorder is the representation of allosomal recessive trait? a) Hemophilia b) Thalassemia c) Sickle cell anemia d) Myotonic dystrophy
8. The process of removal of introns and joining of exons in a defined order in a primary transcripts occurs in a) Prokaryotes b) Eukaryotes c) Prokaryotes and Eukaryotes d) Prokaryotes and Protista
9. A type of Natural selection in which more individuals acquire mean character value is called a) Stabilizing selection b) Disruptive selection c) Directional selection d) Dominant selection
10. Drug called “Heroin is synthesized by a) Methylation of Morphine b) demethylation of Morphine c) Acetylation of Morphine d) deacytalation of Morphine
11. The fungus not used in the production of any Industrial product is a) Penicillium b) Aspergillus c) Trichoderma polysporum d) Glomus
12. Significance of Insertional inactivation method in Recombinant DNA technology is to a) Introduce the recombinants b) Isolate gene of Interest c) Select the recombinants d) Select the gene of interest
13. Which of the following organisms are studied by Cornell’s in his elegant field experiments to study competition a) Warbler species b) Chathamalus and Balanus c) Cucko and Crow d) Cattle egret and grazing cattle
14. The correct sequence in the process of decomposition is a) Humification—-Leaching—-Catabolism—- Mineralisation —-Fragmentation b) Catabolism—-Leaching—-Fragmentation—-Humification—- Mineralisation c) Leaching—-Fragmentation —-Catabolism—-Humification—- Mineralisation d) Fragmentation —-Leaching—-Catabolism—–Humification—-Mineralisation
15. Western Ghats have a greater diversity of a) Amphibians b) Reptiles c) Aves d) Mammals
II. Fill in the blanks by choosing the appropriate word/Words from those given below: 1 x 5 = 5 (Commensalism, Alveoli,Ammensalism, Panspermia, Codominance, Perisperm)
16. The residual, persistent nucellus is called——- 17. The cells of ————secrete milk in the mammary glands. 18. AB blood group inheritance is an example for ————- 19. ——— is the theory that proposes that units of life called spores were transferred to different planets including earth 20. A population interaction in which one species is harmed and the other species is unaffected is ———-
Part – B: Answer any FIVE of the following questions in 3 – 5 sentences wherever applicable: 2 x 5 = 10 21. List any four complications a person suffers from untreated sexually transmitted infections? 22. State the two medical grounds on which a pregnancy can be terminated according to the amended Medical termination of pregnancy act 2017. 23. Give the phenotypes of the parental Drosophila that has produced 1.3% and 37.2% recombinants respectively in T. H. Morgan Dihybrid cross experiment. 24. Differentiate divergent evolution from convergent evolution. 25. List any two differences between active and passive immunity. 26. What are primary lymphoid organs? Give two examples 27. Baculoviruses are excellent biocontrol agents in Integrated Pest Management. Comment. 28. Ecological pyramids have limitations. Justify the statement with two reasons.
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