11. Which of the following plants is biennial? (UPSC Prelims 1989)
[A] Banana
[B] Pineapple
[C] Jack fruit
[D] Carrot
Show Answer
Correct Answer: D [Carrot]
Notes:
The Carrot plant is biennial and develops, in its second year.
12. Which among the following organs secrete bile juice?
[A] Liver
[B] Pancreas
[C] Stomach
[D] Large intestine
Show Answer
Correct Answer: A [Liver]
Notes:
Bile is a digestive juice secreted by the liver and it aids in the digestion of food. Many waste products are eliminated from the body through bile.
13. The science of taxonomy is related to which of the following?
[A] Plant Classification
[B] Animal Classification
[C] Microorgranism
[D] None of these
Show Answer
Correct Answer: A [Plant Classification]
Notes:
The science of taxonomy is related to Plant Classification. Carl Linnaeus is the father of modern Taxonomy. Linnaeus, in his book System Naturae, has divided all living beings into two kingdoms – the plant kingdom and the animal kingdom.
14. Who among the following discovered Vitamin E?
[A] Evans and Bishop
[B] Henrik Dam
[C] Harry Holmes and Ruth Corbet
[D] Sir Edward Mellanby
Show Answer
Correct Answer: A [Evans and Bishop]
Notes:
Vitamin E was discovered by Evans and Bishop in 1922. Work in the 1930s revealed the chemical structure and biological function of alpha-tocopherol.
15. Where does reduction division take place in pteridophytes?
[A] Prothallus is formed
[B] Gametes are formed
[C] spores are formed
[D] sex organs are formed
Show Answer
Correct Answer: C [spores are formed]
Notes:
In ferns, the main plant body is sporophytic. Its leaves, known as sporophylls, have sporangia on them. Reduction division takes place in these spores, producing many spores from them. Spores are the initials of the gametophyte stage.
16. What does Prothallus represent?
[A] sporophytic phase in a fern
[B] gametophytic phase in a fern
[C] sporophytic phase in a gymnosperm
[D] gametophytic phase in a gymnosperm
Show Answer
Correct Answer: B [gametophytic phase in a fern]
Notes:
Prothallus represents the gametophytic phase in a fern. The diploid sporophyte represents a major, independent, photosynthetic, and vascular plant body.
17. What makes the main difference between pteridophytes and bryophytes?
[A] Spermatozoids
[B] Archegonia
[C] Separate gametophytes
[D] conducting system
Show Answer
Correct Answer: D [conducting system]
Notes:
The main difference between bryophytes and pteridophytes is that the former do not have vascular tissue whereas the latter have vascular tissue.
18. Club Moss is placed in which of the following groups?
[A] Fungi
[B] Algae
[C] Bryophyta
[D] Pteridophyta
Show Answer
Correct Answer: D [Pteridophyta]
Notes:
Club Moss is related to Pteridophyta. Club moss is also known as ground pine. It belongs to the Lycopodiaceae family, which includes several species of seedless vascular plants.
19. Gymnosperms are never__?
[A] medium-sized trees
[B] tall trees
[C] herbs
[D] shrubs
Show Answer
Correct Answer: C [herbs]
Notes:
Living gymnosperms are predominantly middle-sized trees to tall trees and shrubs Rarely they are woody climbers. There are no herbs in gymnosperms.
20. Name the plant tissue which helps in the transport of food.
[A] Xylem
[B] Aerenchyma
[C] Phloem
[D] Chlorenchyma
Show Answer
Correct Answer: C [Phloem]
Notes:
Phloem tissue helps in the transport of food throughout the plant. The diverse elements of phloem include phloem fibers, sieve tubes, phloem parenchyma, and companion cells.
