Botany and Plant Science

This is the correct option as node is the point on the stem from where the leaves and branches arise. The portion of the stem that is between the nodes is called inter-node.

In some flowers one or more whorls are missing. Such flowers are called incomplete flowers. Mulberry is an incomplete flower.

This is the incorrect statement. Stamen is the male reproductive part of the flower. It does not form ovule. Stamen consists of anthers and filaments.

This is the correct option as all the statements are correct.

This is the correct choice. Roots, stem and leaves are the vegetative parts of a plant body.

This is the correct choice as the flowers, fruits and seeds are the reproductive parts of the plant body.

The aleurone layer is part of the endosperm in monocot seeds. Since the endosperm is formed by the fusion of two polar nuclei and one male gamete (triple fusion), it is triploid (3n).

Mesogamy refers to the entry of the pollen tube into the ovule through the integuments. Porogamy is entry through the micropyle, and chalazogamy is entry through the chalaza.

In some families like Orchidaceae and Trapaceae, the endosperm fails to develop despite the occurrence of double fertilization. This is a specific biological exception to standard angiosperm development.

Turion’ - a vegetative reproductive structure, is produced in utricularia. They have regenerative properties to grow into whole plants.

The embryo sac, which develops within the ovule, contains the egg cell and is the female gametophyte in angiosperms.

The tapetum is the innermost layer of the anther wall. It is specialized to be secretory or amoeboid to provide nutrients and enzymes to the developing microspores.

In a circinotropus ovule, the funicle is very long and grows around the ovule, causing the ovule to turn 360 degrees, bringing the micropyle back to its original position.

Apospory is the development of an embryo sac from a diploid vegetative cell (like a nucellar cell) without meiosis, resulting in an unreduced embryo sac.

The Nemec phenomenon refers to the formation of embryo sac-like structures within the pollen grains of Hyacinthus orientalis, where the microspore nucleus undergoes divisions similar to those in an embryo sac.