Select the incorrect statement out of the following.a)Assimilatory roo...
Incorrect Statement: Epiphytic roots of Vanda possess well-developed root caps and root hair.
Explanation:
Epiphytic roots are found in plants that grow on other plants (but not as parasites). Vanda is an example of an epiphytic orchid. These roots have specific adaptations to help them absorb water and nutrients from the air and rainwater that accumulates around them. However, they do not possess well-developed root caps and root hairs, which are typical features of terrestrial roots.
Epiphytic Roots in Vanda:
- Epiphytic roots of Vanda are usually thick, fleshy, and covered with a spongy tissue called velamen.
- Velamen acts as a water-absorbing layer and helps in retaining moisture around the roots.
- The outermost layer of velamen cells is dead and lacks a root cap.
- These roots have a specialized tissue called aerenchyma, which provides buoyancy and allows the roots to store water and oxygen.
- Epiphytic roots of Vanda also have a thick, waxy cuticle to reduce water loss through transpiration.
Other Statements:
a) Assimilatory roots capable of photosynthesis are present in Tinospora and Trapa.
- This statement is correct. Tinospora and Trapa are examples of plants that possess assimilatory roots capable of photosynthesis. These roots have chlorophyll and can carry out photosynthesis.
b) Haustoria of Cuscuta make connections with both xylem and phloem tissues of the host.
- This statement is correct. Cuscuta, commonly known as dodder, is a parasitic plant that forms haustoria to extract nutrients from the host plant. Haustoria establish connections with both xylem and phloem tissues of the host, allowing Cuscuta to obtain water and nutrients.
c) Reproductive roots of Ipomoea batata help in vegetative propagation.
- This statement is correct. Ipomoea batata, also known as sweet potato, possesses specialized roots called tubers. These tubers store food reserves and can be used for vegetative propagation to produce new plants.
In conclusion, the incorrect statement is option 'D' - Epiphytic roots of Vanda possess well-developed root caps and root hair. Epiphytic roots do not possess well-developed root caps and root hairs like terrestrial roots.
Select the incorrect statement out of the following.a)Assimilatory roo...
Epiphytic roots are present in air for water absorption not in soil. that's why root cap and root hairs are absent in them.
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