March 29, 2014

Botany Bits for Eamcet Botany as per New Syllabus

Here are some more questions for EAMCET Botany prepared as per new syllabus. Questions from 1-25 are available in the previous post.
26. Assertion (A): Apomixis is an assured reprodcution.
Reason (R): It can take place in the absence of pollinators such as in extreme
conditions.
1) A & R are correct. R explains A.
2) A & R are correct. R do not explains A.
3) A is correct. R is false.
4) A is false. R is correct.

27. Arrange the steps in a sequence that takes place during the formation of embryo
by apomixis. Discard the events not required
a) Zygote b) Megaspore mother cell c) Meiosis
d) Diploid egg e) No meiosis f) Mitosis
g) Male gamats h) Embryo
1) B E D F H 2) A F H E D 3) B D E H F A 4) B F H A E C

28. Assertion (A): The hybrid seeds have to produced every year.
Reason (R): If the seeds collected from hybrids are sown, the plants in the
progeny will segregate and do not maintain hybrid characters.
1) A & R are correct. R explains A.
2) A & R are correct. R do not explains A.
3) A is correct. R is false.
4) A is false. R is correct.

29. Assertion (A): If the hybrids are made into apomicts, the farmer does not have
to buy hybrid seeds every year.
Reason (R): There is no segregation of characters in the apomict made hybrid
progeny.
1) A & R are correct. R explains A.
2) A & R are correct. R do not explains A.
3) A is correct. R is false.
4) A is false. R is correct.

30. Pollination and fertilisation are not required ina)
Apomixis b) Parthenocarpy c) Polyembryony
1) A B C 2) A B 3) B C 4) A C

31. Assertion (A): A tiny seed can produce a large biomass.
Reason (R): Ficus plant produced from a tiny seed can produce bilions of seeds.
1) A & R are correct. R explains A.
2) A & R are correct. R do not explains A.
3) A is correct. R is false.
4) A is false. R is correct.

32. A complete root parasite that produces a friut With thousands of tiny seeds.
1) Striga 2) Orchid 3) Rafflesia 4) Orobanche

33. A partial root parasite that produce a fruit with thousands of seeds.
1) Rafflesia 2) Orobanche 3) Viscum 4) Striga

34. Name the plant whose viable seeds were found during the archeological excavations
at king Herod's palace near the Dead sea whose age is 2000 years.
1) Ficus 2) Lupinus 3) Phoenix 4) Santalum

35. Dormancy period of lupinus-
1) 1000 Years 2) 10,000 years 3) 2000 years 4) 100 years

36. One of the angiospermic plant is microscopic-
1) Lemna 2) Oryza 3) Hydrilla 4) Wolffia

37. In mangrooves seeds germinate while still attached to the mother plant. It is
known as-
1) Epigeal 2) Epiphytic 3) Vivipary 4) Ovipary

38. A zygote undergoes the following events and produces an organisma)
Cell division b) Cell differentiation c) Modifications
1) A B C 2) A B 3) B C 4) A C

39. Organisms of one genaration and the next are linked by the following for the
continuity of species.
1) Meiosis 2) Mitosis 3) Gamets 4) Zygote

40. The fate of zygote depends up on-
1) Environmental conditions 3) Nutrition
3) 1 & 2 4) Life cycle of organism

41. Match the following-
I. External fertilisation A) Majority terrestrial organisms
II. Internal fertilisation B) Fruit bearing plants
III. Zoidogamy & Siphonogamy C) Majority of Algae
IV. Siphonogamy D) Plants bearing naked seeds
I II III IV I II III IV
1) D A B C 2) C A D B
3) A C D B 4) C A B D

42. Internal fertilisation involves the following charactersa)
Male gametes when non motile are carried to female gamete by pollen tube
b) Large number of male gametes produced
c) Male gametes may be motile to reach egg cell
d) Significant reduction in the number of egg cells
e) Reduction in the number of female plants
1) A B C D 2) B C E 3) A D E 4) A B C

43. Every sexually reproducing organ begins life as-
1) Spore 2) Sporophyte 3) Zygote 4) Eggcell

44. In Rockweed meiosis occurs in-
1) Spore mother cell 2) Zygote
3) During the formation of gametes 4) None

45. Meiocytes are the gamete mother cells in-
1) Algae, Fungi 2) Bryophytes
3) All embryo bearing plants 4) Vascular plants

46. Pollengrain germinates on the-
1) Ovule 2) Stigma 3) Style 4) None

47. Parthenogenesis means-
1) Formation of fruit from the ovary without fertilisation
2) Formation of embryo from egg cell without fertilisation
3) Formation of an embryo
4) Formation of embryo sac without cell division

48. Assertion (A): Male gametes are produced in large numbers when compared to
the female gametes.
Reason (R): A large number of male gametes fail to reach the female gametes.
1) A & R are correct. R explains A.
2) A & R are correct. R do not explains A.
3) A is correct. R is false.
4) A is false. R is correct.

49. If a species produces male and female gametes it is called-
1) Homogametic 2) Heterogametic
3) Isogametic 4) Anisogametic

50. A plant which produces gametes is
1) Diploid 2) Haploid or diploid 3) Haploid only 4) Male

Answers:

26-1; 27-1; 28-1; 29-1; 30-2; 31-1; 32-4; 33-4; 34-3; 35-2; 36-4; 37-3; 38-1; 39-4; 40-4; 41-2; 42-1; 43-3; 44-3;
45-4; 46-2; 47-2; 48-1; 49-2; 50-2.

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