Question

Plant which produce characteristics pneumatophores and show vivipary belongs to
A. Hydrophytes
B. Mesophytes
C. Halophytes
D. Psammophytes

Answer 1

Hint: Halophytes are plants which produce pneumatophores and show Viviparity. They show germination of seeds inside fruits.

Complete Solution:
These plants are well adapted to grow in highly saline habitats. They have pneumatophores which helps them in respiration as they do not get sufficient oxygen from soil.
Pneumatophores help in the exchange of gases as these plants are useful in respiration.
Halophytes are salt tolerant plants that grow in water with high salinity such as marshy swamps and sea shores.
Only two percent of the plant species found on earth are halophytes.
Halophytes have the abilities to tolerate high salt concentrations of the soil by maintaining more negative cellular water potential to absorb water from a soil solution of low water potential.
Their root cells that are pneumatophores have a higher than normal concentration of solutes, which enables them to take up water by osmosis from the surrounding soil.
>So, the correct answer is option c.

Note: Some halophytes seeds can germinate in the presence of high salinity. Other halophytes accumulate NaCl or synthesis osmotically compatible solutions such as proline in their shoots to increase their ability to absorb water.
Examples of halophytes include: - sea lavender (Limonium), and rice grass (Spartina).
Halophytes have thick cuticles which also allow them to survive in salty conditions.
Cellular sequestration – halophytes can sequester toxic ions and salts within the cell wall or vacuoles.