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1. Which one of the following belongs to the family Muscidae?
(a) Housefly(b) Firefly(c) Grasshopper(d) Cockroach
2. Which of the following statements are correct about the leaf?(i) Leaf is a lateral, generally flattened structure borne on the stem.(ii) It develops at the node and bears a bud in its axil.(iii) Leaves originate from root apical meristems and arranged in an acropetal order.(iv) They are the most important vegetative organs for reproduction.(v) A typical leaf consists of 4 main parts
(a) (i) and (ii)(b) (ii) and (iii)(c) (i),(ii) and (iv) (d) All of these
3. Specialised epidermal cells surrounding the guard cells are called
(a) Complementary cells (b) Subsidiary cells(c) Bulliform cells(d) Lenticels
4. Statement I: Synapsis of homologous chromosome occurs during prophase I. Statement II: Nucleoli may reappear in telophase I.
(a) Both Statement I and Statement II are incorrect(b) Statement I is correct but Statement II is incorrect(c) Statement I is incorrect but Statement II is correct(d) Both Statement I and Statement II are correct
5. ADP is phosphorylated and NADP is reduced, this happens during.
(a) dark phase of photosynthesis(b) light phase of photosynthesis(c) Photorespiration (d) Calvin cycle
6. Assertion : Mitosis division results in the production of diploid cells. Reason : Synapsis occurs during zygotene of meiosis.a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)b) (A) is correct but (R) is not correctc) (A) is not correct but (R) is correctd) Both (A) and (R) are correct and (R) is the correct explanation of (A)Deselect Answer
7. Filiform apparatus is found in
(a) synergids (b) anther wall(c) secondary nucleus (d) egg cell
9. What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
(a) Turner’s syndrome (b) Klinefelter’s syndrome(c) Edward syndrome (d) Down’s syndrome
10. Statement I: Stop codons for tRNAs are UAA, UAG, UGA. Statement II: tRNAs are not specific for each amino acid.a) Both Statement I and Statement II are incorrectb) Statement I is correct but Statement II is incorrectc) Statement I is incorrect but Statement II is correctd) Both Statement I and Statement II are correctDeselect Answer
11. Statement I: Genetic diversity comprises of different type of gene in different type species as well as same species. Statement II: Amphibian species diversity is more in Eastern Ghats than the Western Ghat.
12. Assertion: After 24 hours, toddy becomes unpalatable. Reason: The fermentation of toddy is continued by naturally occurring yeasts.
(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)(b) (A) is correct but (R) is not correct(c) (A) is not correct but (R) is correct(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)
13. Organisms which are indicator of pollution of air are
(a) Mosses (b) Lichens(c) Mushrooms(d) Puffballs
14. Statement I: Microsporangium is generally surrounded by four wall layers – epidermis, endothecium, middle layer and tapetum. Statement II: The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.In the light of the above statements, choose the correct answer from the options given below:a) Both Statement I and Statement II are incorrectb) Statement I is correct but Statement II is incorrectc) Statement I is incorrect but Statement II is correctd) Both Statement I and Statement II are correctDeselect Answer
Deselect Answer
16. Species interaction with negative influence on both is referred to as
(a) amensalism(b) mutualism(c) commensalism(d) competition
18. Which of the following is a free living aerobic non- photosynthetic nitrogen-fixer?
(a) Rhizobium(b) Azotobacter(c) Azospirillum (d) Nostoc
19. C4 acid, formed in the mesophyll of C4 plants leaf during photosynthesis is
(a) OAA or malic acid or aspartic acid(b) pyruvic acid(c) succinic acid (d) fumaric acid
20. Azotobacter and Beijerinckia are the examples of
(a) symbiotic nitrogen-fixers(b) non-symbiotic nitrogen-fixers(c) ammonifying bacteria(d) disease causing bacteria