The proximal end is attached to the thalamus whereas the distal end bears anther.

Correct Option: D

The proximal end is attached to the thalamus whereas the distal end bears anther.

Papilionaceous flowers are flowers with the characteristic irregular and butterfly-like corolla. A single, large upper petal is known as the banner or vexillum and the name has been derived from an ancient military standard.

Correct Option: C

Papilionaceous flowers are flowers with the characteristic irregular and butterfly-like corolla. A single, large upper petal is known as the banner or vexillum and the name has been derived from an ancient military standard.

Heterospory, development of seed habit and ligulate leaves are important features of Selaginella. The reproductive structure in Selaginella is strobilus. A strobilus has many ligulate sporophylls. Two types of spores are produced megasporophylls and microsporophylls. Ligule is a small leaf like outgrowth at the base of leaf.

Correct Option: D

Heterospory, development of seed habit and ligulate leaves are important features of Selaginella. The reproductive structure in Selaginella is strobilus. A strobilus has many ligulate sporophylls. Two types of spores are produced megasporophylls and microsporophylls. Ligule is a small leaf like outgrowth at the base of leaf.

Whorled phyllotaxy is a feature of Nerium and Alstonia. In Alstonia five leaves are present in a whorl while in Nerium three leaves are present in a whorl.

Correct Option: D

Whorled phyllotaxy is a feature of Nerium and Alstonia. In Alstonia five leaves are present in a whorl while in Nerium three leaves are present in a whorl.

In Opuntia, leaves become modified into spines to avoid transpiration so as to save water for desert adaptation. The stems of this plant appear like-leaf, termed as- phylloclades which perform the process of photosynthesis.

Correct Option: D

In Opuntia, leaves become modified into spines to avoid transpiration so as to save water for desert adaptation. The stems of this plant appear like-leaf, termed as- phylloclades which perform the process of photosynthesis.