11. Cycas, Pinus, Ephedra are examples of which of the following?
[A] Gymnosperms
[B] Angiosperms
[C] Pteridophyta
[D] None of these
Show Answer
Correct Answer: A [Gymnosperms]
Notes:
Cycas, Pinus, Ephedra are examples of Gymnosperms. Gymnosperms have a well differentiated plant body and vascular tissue. They bear naked seeds, (the seeds are not enclosed within a fruit).
12. Which of the following is true about the cell wall of Gram-positive bacteria?
[A] It consists of multiple layers
[B] It is thicker than that associated with gram-negative bacteria
[C] It contains teichoic acids
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
The cell wall of Gram-positive bacteria are: consists of multiple layers, thicker than that associated with gram-negative bacteria and contains teichoic acids.
13. Which of the following is the proof of the aquatic origin of bryophytes?
[A] Ciliated sperms
[B] Green colour
[C] Protonema thread
[D] Some are still aquatic
Show Answer
Correct Answer: A [Ciliated sperms]
Notes:
Ciliated sperms are proof of the aquatic origin of bryophytes.
14. Which is the innermost tissue and gives rise to the xylem and phloem?
[A] Protoderm
[B] Procambium
[C] Ground Meristem
[D] Promeristem
Show Answer
Correct Answer: B [Procambium]
Notes:
Procambium is the innermost tissue and gives rise to the xylem and phloem. It helps in transporting water and nutrients to different parts of the plant.
15. Which plant tissue is the only tissue with the highest refractive index due to the presence of pectin?
[A] Sclerenchyma
[B] Collenchyma
[C] Parenchyma
[D] Laticiferous
Show Answer
Correct Answer: B [Collenchyma]
Notes:
Collenchyma tissue is the only tissue with the highest refractive index due to the presence of pectin.
16. Which of the following stimulates by gibberellin hormone?
[A] shoot elongation
[B] seed germination
[C] fruit and flower maturation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Gibberellins hormones stimulate shoot elongation, seed germination, and fruit and flower maturation.
17. Which of the following is similar to autogamy, but requires pollinators?
[A] Geitonogamy
[B] Cleistogamy
[C] Apogamy
[D] Xenogamy
Show Answer
Correct Answer: A [Geitonogamy]
Notes:
Geitonogamy is similar to autogamy but requires pollinators. Autogamy is the pollination of a flower by its own pollens. Same geitonogamy is the pollination of one flower by the pollen grains of another flower on the same plant.
18. Papaya foot rot is caused by which of the following?
[A] Phytophthora palmivora
[B] Albugo candida
[C] Peronospora parasitica
[D] Pythium aphanidermatum
Show Answer
Correct Answer: D [Pythium aphanidermatum]
Notes:
Papaya foot rot is caused by Pythium aphanidermatum. It is characterized by the presence of water-soaked patches on the stem near ground level.
19. The fish living in stagnant water is __
[A] Lepidosiren
[B] Protopterus
[C] Neoceratodus
[D] None of these
Show Answer
Correct Answer: C [Neoceratodus]
Notes:
The fish living in water is Neoceratodus. Neoceratodus is a genus of lungfish in the family Neoceratodontidae. Neoceratodus found in Australia.
20. Which of the following is the world’s only poisonous lizard?
[A] Draco
[B] Heloderma
[C] Sphenodon
[D] Varanus
Show Answer
Correct Answer: B [Heloderma]
Notes:
Heloderma is the world’s only poisonous lizard. Heloderma is also called the beaded lizard because its scales resemble pearls.
