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Biology : Taxonomy Part-III

📆 October 25, 2024

Total Questions: 40

1. Which one of the following parts of the pitcher plant becomes modified into a pitcher? [I.A.S. (Pre) 2001]

Correct Answer: (b) Leaf
Solution:The pitcher plant is a carnivorous plant with highly modified leaves in the form of pitchers that act as pitfall traps for prey. The narrow pitcher leaves are tapered tubes that rise up 6-10 cm from the ground, with a mouth 6 to 10 cm in circumference.

2. Which one of the following is not correctly matched? [U.P. R.O./A.R.O. (Pre) 2016]

Correct Answer: (d) Nepenthes — Parasitic angiosperm
Solution:Pitcher plants or Nepenthes are able to synthesize their food by the process of photosynthesis, hence they are autotrophic. Usually, they grow on soils deficient in nitrogen compounds and fulfill their required nitrogen by digesting insects. Other options are correctly matched.

3. Which of the following is an insectivorous plant? [U.P. P.C.S. (Pre) 2015]

Correct Answer: (d) Nepenthes
Solution:Nepenthes are insectivorous pitcher plants. Nepenthes species are perennial herbaceous plants and frequently grow in very acidic soil, though some are epiphytes. All the species are carnivorous plants that capture insects and other prey by means of modified pitcher-shaped leaves that function as passive pitfall traps.

4. Nepenthes khasiana a rare and endangered plant is found in — [U.P.P.C.S. (Mains) 2011]

Correct Answer: (c) Meghalaya
Solution:Nepenthes khasiana is India’s only pitcher plant and is named after the Khasi Hill region of Meghalaya. They grow mostly found in Garo, Khasi and Jaintia hills region of Meghalaya.

5. Turmeric is obtained from which part of the plant: [U.P.P.C.S. (Pre) 2006, R.A.S./R.T.S. (Pre) 1999]

Correct Answer: (b) Stem
Solution:Turmeric is obtained from the modified stem (rhizome) of the plant. It is a member of the curcuma botanical group, which is part of a ginger family of herbs, the Zingiberaceae. Its botanical name is Curcuma longa. All curcumas are perennial plants native to southern Asia. They grow in warm humid climates and thrive only in temperatures above 60°F (29.8°C). India, Srilanka, Fiji and Queensland (Australia) all have the climate, which is conducive to grow turmeric.

6. Which of the following is the eatable part of turmeric plant? [M.P.P.C.S. (Pre) 1993]

Correct Answer: (b) Rhizome
Solution:Turmeric is obtained from the modified stem (rhizome) of the plant. It is a member of the curcuma botanical group, which is part of a ginger family of herbs, the Zingiberaceae. Its botanical name is Curcuma longa. All curcumas are perennial plants native to southern Asia. They grow in warm humid climates and thrive only in temperatures above 60°F (29.8°C). India, Srilanka, Fiji and Queensland (Australia) all have the climate, which is conducive to grow turmeric.

7. Turmeric is an example of underground stem, known as: [U.P. R.O./A.R.O. (Mains) 2021]

Correct Answer: (d) Rhizome
Solution:Turmeric is obtained from the modified stem (rhizome) of the plant. It is a member of the curcuma botanical group, which is part of a ginger family of herbs, the Zingiberaceae. Its botanical name is Curcuma longa. All curcumas are perennial plants native to southern Asia. They grow in warm humid climates and thrive only in temperatures above 60°F (29.8°C). India, Srilanka, Fiji and Queensland (Australia) all have the climate, which is conducive to grow turmeric.

8. Which of the following underground produced vegetables is a modified root? [U.P.P.C.S. (Mains) 2005]

Correct Answer: (b) Sweet Potato
Solution:The sweet potato (Ipomoea batatas) is a dicotyledonous plant that belongs to the family Convolvulaceae. Sweet potato is a modified root cultivated by vegetative propagation.

9. The storage organ of which of the following plants is not a stem? [U.P. U.D.A./L.D.A. (Mains) 2010]

Correct Answer: (d) Sweet potato
Solution:Sugarcane, potato, and ginger are modified stems i.e., their storage organ is stem, while the storage organ of sweet potato is root. It is developed by radicle.
  • Potato:

The edible part of the potato is a tuber, a modified stem that stores food. It develops from an underground stem called a stolon.

  • Ginger:

The edible part of ginger, known as the rhizome, is a horizontal underground stem that stores food and nutrients.

  • Sugarcane:

The sugarcane plant's main stem, often referred to as the stalk, stores food in the form of sucrose.

  • Sweet Potato:

The sweet potato is a root vegetable. It stores food in its swollen, tuberous roots.

10. Which of the following is a stem? [U.P.P.C.S. (Pre) (Re. Exam) 2015]

Correct Answer: (b) Ginger
Solution:Ginger is a modified stem known as a rhizome. It grows underground and stores starch and other nutrients. Potatoes are also stems. They are tubers, a type of modified stem.

Turnip: A turnip is a root modification. It is a thickened root that stores food.

Carrot: A carrot is also a root modification. It is a taproot that stores nutrients.

Sweet potato: While often called a potato, a sweet potato is actually a root modification. It is a tuberous root, similar to a carrot.

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