Morphology of Flowering Plants Test 73

In the bud stage, the inner floral parts are covered with the outer whorl of calyx made up of sepals. When the bud opens, the sepals remain at the base at protection.

A. The whorl of petals called corolla form the next whorl after sepals. It protects the androecium and gynoecium and also attracts pollinators.

B. Anthers are the parts of stamens that produce microspores or pollen grains.

C. Sepals cover the floral bud.

D. Stigmas are the parts of carpel that receive the pollen grains.

Hence, the correct answer is 'Sepals'

Hypanthium is the cup-like structure that develops from the fusion of sepals petals and stamens to the thalamus outgrowth and it is seen in the family Rosaceae. 

The flower is the modified shoot because of the following characters are seen in it:

(a) In the racemose type of inflorescence, the youngest flower is borne near the apex and the oldest is borne at the base of the inflorescence. This is called the acropetal order. Basipetal order is seen in the cymose inflorescence.

Pisum commonly known as a pea is a genus of flowering plant belonging to family Fabaceae. In Fabaceae, the flowers are zygomorphic (bilateral symmetry), bisexual. The petals 5, polypetalous, the posterior outermost petal is large (the vexillum or standard), two lateral petals (the wings or alae) and the two anterior and innermost petals are united to form a boat-shaped structure (the keel or carina), descending imbricate or vexillary aestivation. Stamens are 10, diadelphous (stamens united by their filaments so as to form two groups). Placentation is marginal (placenta forms a rigid along ventral side and ovules are arranged in two vertical rows). So, the correct answer is 'Pisum'.

The axis or the internode that elongates between the corolla and androecium is called androphore. It is also called as gynandrophore. Anthophore is present between calyx and corolla. Gynophore is present between androecium and gynoecium.

Leaves, in which stomata are present on the upper epidermis are called epistomatic leaves. In Nympheae, Nelumbo, Victoria, epistomatic leaves are present.

So, the correct option is ‘All of the above’.

An inflorescence is a group or cluster of flowers arranged on a stem that is composed of the main branch or a complicated arrangement of branches. In the genus Euphorbia, the flowers are in cup-shaped clusters called cyathia, each of which seems to be a single female flower but actually consists of a single pistil surrounded by several male flowers, each of which has a single stamen. The plant Poinsettia, have clusters of small, greenish, cup-shaped structures called cyathia. Each cyathium is actually a flower cluster or inflorescence containing unisexual, apetalous male and female flowers.

• An inflorescence is a group or cluster of flowers arranged on a stem that is composed of the main branch or a complicated arrangement of branches. 
• Cyme is an arrangement of flower cluster with a central stem bearing a single terminal flower that develops first and the other flowers in the cluster developing as terminal buds of lateral stems. 
• A dichasial cyme is a determinate inflorescence in which the growth of the central axis is terminated by a flower that opens first and each pair of branches subtending this flower then is terminated by a single flower.
  
• In Jasmine flower, the flowers are borne in cymose clusters with a minimum of three flowers, though they can also be solitary on the ends of branchlets (i.e. shows dichasial cyme).

So the correct option is 'jasmine'.