Botany and Plant Science

Leaves of C4 plants show two type of cells, viz. outer mesophyll cells and inner spongy bundle sheath cells arranged in a circular manner like a necklace. Thus, leaves of C4 plants contain two types of chloroplast, viz. mesophyll chloroplast and bundle sheath chloroplast, i.e. dimorphic chloroplast. Thus, in these plants, C4 pathway occurs. This anatomy of leaves in C4 plants is called Kranz anatomy.

In Buddhist symbolism, the lotus flower holds special significance and is closely associated with Buddha. The lotus represents purity, enlightenment, and spiritual awakening because it grows beautifully in muddy waters yet remains unstained. This makes it the perfect symbolic flower for Buddha's teachings.

The root cap is a protective structure made of specialized cells that covers the tip of growing roots. It protects the delicate root apical meristem (the growth tissue) from damage as the root pushes through the soil. The stem is above ground, cambium is vascular tissue, and cuticle is a waxy layer on epidermis - none of these cover root tips.

Many cactus species bloom only once a year, typically in spring or during brief rainy periods. This adaptation conserves water and energy in arid environments. The brief blooming period maximizes pollination success when conditions are favorable.

Aerial roots grow above ground and are exposed to air. They serve various functions like support (in banyan trees), respiration (in mangroves), or moisture absorption (in some orchids). Unlike taproots or adventitious roots, aerial roots have adapted to aerial conditions.

Bougainvillea is a tropical plant known for its colorful bracts (modified leaves) and sharp thorns. The thorns provide protection while the bracts attract pollinators. Lilies, hibiscus, and sunflowers have flowers but no thorns.

Roots serve as storage organs in plants, storing carbohydrates and nutrients. Examples include carrots, sweet potatoes, and radishes which are actually modified roots. Stems transport materials, flower buds develop into flowers, and thorns provide protection.

Tulips are widely recognized as iconic spring flowers that bloom prominently during the spring season. They are one of the most popular and cultivated flowers worldwide for spring gardens.

Ethylene induces flowering in pineapple.

One sperm fertilises the egg cell and the other fertilises the central cell. The resulting embryo and endosperm are genetically identical except for ploidy level: the embryo is diploid and the endosperm is triploid.

Aerenchyma is a soft plant tissue containing air spaces, found especially in many aquatic plants.

Nyctinasty is the sleep movement (opening and closing) of plant organs, such as leaves and flowers, due to day and night periods of daily rhythm.

Adventitious roots arise from an organ other than the root; usually a stem, sometimes a leaf. These can arise from the plumule (embryonic stem).

Circinate vernation is the manner in which a fern frond emerges. As the fern frond is formed, it is tightly curled so that the tender growing tip of the frond (and each subdivision of the frond) is protected within a coil.

Quiescent centre is a region in the apical meristem of a root where cell division proceeds very slowly or not at all, but the cells are capable of resuming meristematic activity.