11. What is the stage in which a plant slows down its cellular activity and sheds its leaves?
[A] dormancy
[B] abscission
[C] tropisms
[D] None of these
Show Answer
Correct Answer: A [dormancy]
Notes:
Dormancy is the stage in which a plant slows down its cellular activity and sheds its leaves.
12. Downy mildew disease is caused by which of the following?
[A] Fungus
[B] Bacteria
[C] Virus
[D] None of these
Show Answer
Correct Answer: A [Fungus]
Notes:
Downy mildew disease is caused by Fungus (Pseudoperonospora cubensis). Downy mildew can infect all cucumbers, including cucumbers, melons, pumpkins, and squash.
13. Which of the following pair is correctly matched?
[A] Mustard – Tikka
[B] Groundnut – Downy mildew
[C] Cumin Seed – Alternaria blight
[D] Brinjal – Powdery mildew
Show Answer
Correct Answer: C [Cumin Seed – Alternaria blight]
Notes:
Alternaria blight is caused by the fungus Alternaria cucumerina. This is a common disease of Cumin Seed.
14. Spiders, butterflies, and mosquitoes belong to which of the following?
[A] Mollusca
[B] Echinodermata
[C] Annelida
[D] Arthropoda
Show Answer
Correct Answer: D [Arthropoda]
Notes:
Spiders, butterflies, and mosquitoes belong to Arthropoda. This means jointed legs. This is the largest phylum in the animal kingdom.
15. Which of the following are Lower Invertebrates?
[A] Porifera
[B] Echinodermata
[C] Ctenophora
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Lower invertebrates organisms belonging to the phyla Porifera, Cnidaria, Ctenophora, Platyhelminthes, Eschelaminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata, and Chordata.
16. In which there are two forms of polyp or medusa?
[A] Cnidaria
[B] Platyhelminthes
[C] Aschelminthes
[D] Ctenophora
Show Answer
Correct Answer: A [Cnidaria]
Notes:
In Cnidaria, there are two forms of polyp (sessile and cylindrical) or medusa.
17. What are the unique characteristics of Platyhelminthes?
[A] Presence of flame cells
[B] Ladder-like nervous system
[C] Presence of parenchyma in the body cavity
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The presence of flame cells, Ladder-like nervous system, Presence of parenchyma in the body cavity, and Self-fertilization are the unique characteristics of Platyhelminthes.
18. Cephalopoda is a class of animals in which__.
[A] Notochord extends up to the head
[B] The foot is located on the head
[C] The Head is located on the foot
[D] The Head is fused with the thorax
Show Answer
Correct Answer: B [The foot is located on the head]
Notes:
Cephalopoda is a class of animals in which the foot is located on the head. A cephalopod is any member of the class Cephalopoda of the phylum Mollusca.
19. Which one is not correctly matched –
[A] Mollusca – Pseudocoel
[B] Cnidaria – Nematocyst
[C] Annelida – Chloragogen cells
[D] Echinodermata – Water vascular system
Show Answer
Correct Answer: A [Mollusca – Pseudocoel]
Notes:
Pseudocelom is found in animals belonging to the phylum Nematoda or Aschelaminthes.
20. Which of the following birds cannot fly?
[A] Kiwi
[B] Ostrich
[C] Penguin
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Kiwi, Ostrich, Kakapo, Steamer duck, Takahe, Cassowary, Weka, and Penguin birds cannot fly.
