Botany and Plant Science

In angiosperms, the reproductive organs (stamens and carpels) are aggregated in the flower, which is the characteristic reproductive structure of flowering plants. The flower contains male and female organs that facilitate pollination and fertilization, leading to fruit and seed formation.

Dicots (dicotyledons) are characterized by having two cotyledons (seed leaves) in their embryos. Other distinguishing features include net-like leaf venation, taproot systems, and floral parts typically in multiples of four or five. Monocots have only one cotyledon.

Dicots are characterized by two cotyledons, seeds, and vascular bundles. Rhizoids are root-like structures found in non-vascular plants like bryophytes (mosses), not in dicots. Hence, rhizoids are not a dicot feature.

No, they are non-living tubes.

 Apogamy is formation of sporophyte from vegetative tissue of gametophyte without gamete formation.

 Apex is modified into tendril in gloriosa.In weak- stemmed plants, leaf or a part of leaf gets modified into green thread­like structures called tendrils which help in climbing around the support.

 The roots of vascular plants are normally considered to have exarch development .Exarch is used when there is more than one strand of primary xylem in a root, and the xylem develops from the outside inwards towards the center, i.e. centripetally.

 Cleistogamy is found in family Arachis. Cleistogamy or automatic self-pollination describes the trait of certain plants to propagate by using non-opening, self-pollinating flowers.

 Layering is mode of vegetative reproduction in bignonia.In this method, a branch of the plant is pulled towards the ground and a part of it is covered with moist soil leaving the tip of the branch exposed above the ground. After some time, new roots develop from the part of the branch buried in the soil. The branch is then cut off from the parent plant. The part of the branch which has developed roots grows to become a new plant (just like the parent plant).

 Procambium is tissue in subtropical region of shoot apex.The procambium is characterized by intensive longitudinal cell growth and by the elongated (prosenchymal) shape of the cells. Cell division occurs in various directions, with vascular tissues— primary xylem and phloem—arising from the cells.

The streaming movement in staminal hairs of tradescantia is circulation cyclosis movement.

The bending of an organ, such as petioles, leaves, and peduncles, towards the ground, not due to gravity, is called epinasty.

Tendrils of climbers, like cucurbits, exhibit thigmonastic responses.

Stem is negatively geotropic and root is positively geotropic.

The lotus (Nelumbo nucifera) is India's national flower, declared so in 1950 due to its cultural and religious significance in Indian tradition. It symbolizes purity, beauty, and spiritual awakening. Roses, lilies, and sunflowers are not national symbols of India.