Tag: growth and development in plants

Calyx and corolla are called as accessory whorls. In some plants they are not differentiated from one another, in such case they are termed as perianth.

The sheath or the perianth, of the inflorescense around the seed in the inflorescence is the edible part of the jackfruit. It is yellow shiny part. The perianth is the non-reproductive part of the flower and structure that forms an envelope surrounding the sexual organs, consisting of the calyx and the corolla.
Thus, the correct answer is option C.

Nectary of Euphorbia is an example of secretory tissue. The tissues that are concerned with the secretion of gums, resins, volatile oils, nectar latex and other substances in plants are called as secretory tissues. These tissues are divided into two groups: laticiferous tissues and glandular tissues. 

Stamens are numerous, epipetalous and monadephous. The filaments of all the stamens fuse to form staminal tube, round the style is a characteristic feature of family Malvaceae.

The edible fleshy part of an apple is the thalamus, which develops along with the ovary to form a false fruit (pome). Bracts, cotyledons, and endosperm are parts of flowers or seeds with entirely different functions and locations.

Achlamydeous flowers are those flowers that lack floral envelope. these flowers are also referred to as naked flowers.

The whorl of the flower are differentiated into two categories essential and non-essential whorl and are consists of 

A bisexual flower is a flower that contains all the four whorls such as petals, sepals, the male reproductive structure (stamen) and female reproductive structure (pistil/ carpel). Hence it is also called as a complete or perfect flower. Petunia is a bisexual flower. Thus the correct answer is option A.

A small leaf-like appendage on each side at the base of the petiole in dicotyledons is called as a stipule. The arrangement and structure of the stipules are called as the stipulation. When the pair of stipules is arranged freely on either side of the petiole or leaf base, it is called as free lateral stipules. For example, Hibiscus and Gossypium. 
Therefore, the correct answer is option D.

Stigma is the part of the female reproductive part in flower where the pollen grain lands after pollination. It is the one who decides the compatibility of pollen with the plant and it is sticky so that is able to hold the pollen strongly.