Biology : Morphology of Flowering Plants

The characteristic that does not belong to perigynous flowers is

• Thalamus is disc shaped, cup or flask shaped

• Ovary is superior, other parts are inferior

• Thalamus is hollowed out and is fused with ovary wall

• Androperianth is borne around or above the level of ovary.

Gerdy fibres are

• ligament of neck 

• ligament of ankles

• ligament of palm

• ligament of face

Assertion: Black rust of wheat is a hazardous disease which is caused by Puccinia fungus.

Reason: Aflatoxin is produced in the groundnut by the infection of a bacterium.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Select the option that contains all plants which produce non-endospermic seeds.

• Gram, Pea, Bean, Groundnut

• Castor, Peanut, Orchid, Wheat

• Coconut, Walnut, Wheat, Gram

• Castor, Maize, Coconut, Orchid

The Floral formula of tobacco is

• Br${\oplus }_{+}$O^$\to$K₍₅₎ C₍₅₎ A₅ G₍₂₎

• ${\oplus }_{+}$O^$\to$K_{6 - 5} A₁₀ G₍₂₎

• Br${\oplus }_{+}$O^$\to$K_{2 + 2} C₄ A_{2 + 4} G₁(d)

• ${\oplus }_{+}$O^$\to$P₂ A₃ G₁

The infloresence in Mimosa pudica is

• Umbel

• Spike

• Corymb

• glabose head