Question

Select the correct pair.

• A. Phyllode–Australian Acacia and Asparagus
• B. Tendril of grapes–modification of leaf
• C. Axile placentation–Citrus
• D. Sucker–Zamikand

Answer 1

The correct option is C Axile placentation–Citrus

Placentation is the arrangement of ovules within the ovary. It is of different types namely, marginal (pea), parietal (mustard, Argemone), axile (China rose, tomato, Citrus) and free central (Dianthus, Primrose).

Phylloclade is the modified stem which is flat or cylindrical and capable of unlimited growth. These are green in colour and capable of photosynthesis. Examples are Opuntia, Euphorbia, etc.

Cladophyll or cladodes also a modified stem of limited growth. They are green and also capable of photosynthesis. They also bear axillary bud. Examples are Ruscus and some Asparagus species.

Stem tendrils are a thread like flexible structures which can coil around any kind of support. Branched stem tendrils may bear scale leaves in the region of forking, e.g., grapevine.

A sucker is a shoot that develops from a lateral bud on the rhizome and emerges from the soil usually near the parent plant. It is a form of asexual, or vegetative, reproduction, that makes the banana plant perennial.