Tag: ecological adaptations, succession and ecological services

Questions Related to ecological adaptations, succession and ecological services

Belt's corpuscles occur on

botany ecological adaptations, succession and ecological services plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Casuarina roots

  2. Casuarina leaves

  3. Leaves of Acacia sphaerocephala

  4. Roots of Acacia sphaerocephala

Show answer
Correct Option: C
Explanation:

Belt's corpuscles are certain corpuscles containing food secreted by the plants at the tips of their leaflets for ants to maintain myrmecophily. They are seen in leaves of acacia sphaerocephala as it is a myrmecophile.

So, the correct answer is 'Leaves of Acacia sphaerocephala'.

Which of the following is wrong about xerophytes?

botany ecological adaptations, succession and ecological services plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Sunken stomata

  2. Small spiny leaves

  3. Thick cuticle

  4. Large number of stomata

Show answer
Correct Option: D
Explanation:

 Xerophytes show structural adaptations to discourage water loss through transpiration and increase water absorption. Such, adaptations include small spiny leaves, thick waxy cuticle on leaf surface, sunken stomata and well developed vascular tissue. Leaves show reduction in number of stomata to cut off transpiration losses of water. Also some succulents show 'Crassulacean Acid Metabolism (CAM)'. Their stomata open only during night.

Thus, the correct answer is option D.

The plants of this group are adapted to live partly in water and partly above substratum and free from water. Name the group.

botany ecological adaptations, succession and ecological services plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Xerophytes

  2. Thalophytes

  3. Halophytes

  4. Hydrophytes

Show answer
Correct Option: C
Explanation:

Halophytes are plants adapted to grow in saline conditions. They grow in mangroves, coastal dunes and marshes. The environmental conditions are high salinity and high level of water. The lower parts of trees are permanently submerged in water and grow pneumatophores for gaseous exchange and respiration. The upper parts of these plants are not submerged and freely exposed to atmosphere.

Which of the following is not an adaptive feature of plants growing in physiologically dry soil?

botany ecological adaptations, succession and ecological services plant adaptation adaptation in plants plant habitat importance and classification of angiosperms

  1. Pneumatophore

  2. Vivivary

  3. Sunken stomata

  4. All of the above

Show answer
Correct Option: C
Explanation:

Physiologically dry soil means that water is present in soil but due to high levels of salt, it is not available to plants as plants cannot easily absorb the water present in soil. Such plants are called halophiles, e.g., mangrove plants like Sonnertia, Rhizophora, Avicennia etc. Such plants show several unique features such as presence of pneumatophores and vivipary. Sunken stomata is not shown by mangroves but is shown by xerophytes which grow in physically dry soil. Thus, the correct answer is option C.