NEET UG Karnataka 2013 Biology Questions and Answers

 21. The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of

a. IAA, IBA
b. NAA, 2, 4-D
c. Phenyl acetic acid
d. Cytokinin
22. Which of the following elements is a constituent of biotin?
a. Sulphur
b. Magnesium
c. Calcium
d. Phosphorus
23. Bundle sheath cells
a. Are rich in Rubisco
b. Are rich in PEP carboxylase
c. Lack RuBisCo
d. Lack both RuBisCo and PEP carboxylase
24. Which one of the following statements is correct?
a. Geitonogamy involves the pollen and stigma offlowers of different plants
b. Cleistogamous flowers are always autogamous
c. Xenogamy occurs only by wind pollination
d. Chasmogamous flowers do not open at all
25. Megaspores are produced from the megaspore mother cells after
a. Meiotic division
b. Mitotic division
c. Formation of a thick wall
d. Differentiation
26. Syngamy can occur outside the body of the organism in
a. Fungi
b. Mosses
c. Algae
d. Ferns
27. Animal vectors are required for pollination in
a. Maize
b. Vallisneria
c. Mulbery
d. Cucumber
28. Which of the following statements is correct?
a. Sporopollenin can withstand high temperatures but not strong acids
b. Sporopollenin can be degraded by enzymes
c. Sporopollenin is made up of inorganic materials
d. Sporopollenin can withstand high temperatures as well as strong acids and alkalis
29. Albuminous seeds store their reserve food mainly in
a. Perisperm
b. Endosperm
c. Cotyledons
d. Hypocotyl
30. Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as
a. Mutation
b. Migration
c. Natural selection
Genetic drift
Answers
21. b. NAA, 2, 4-D
22. a. Sulphur
23. a. Are rich in Rubisco
24. b. Cleistogamous flowers are always autogamous
25. a. Meiotic division
26. c. Algae
27. d. Cucumber
28. d. Sporopollenin can withstand high temperatures as well as strong acids and alkalis
29. b. Endosperm
30. Genetic drift