Botany and Plant Science

Most crucifers (Brassicaceae) have tetradynamous stamens (4 long + 2 short = 6 stamens). However, the genus Senebiera is exceptional in having only 2 stamens instead of the typical 6.

Lignin deposition strengthens cell walls, making them waterproof and rigid. Xylem vessels and tracheids require extensive lignification to withstand water transport under tension. Phloem, parenchyma, chlorenchyma, and cambium have minimal or no lignification.

This is the correct option. Mistletoe is a partial parasite. This plant has green leaves and can synthesise its own food. But it recieves water and minerals from the host plant on which it grows.

The tapetum is the innermost nutritive layer surrounding spore mother cells in the anther. It provides essential nutrients and enzymes for pollen development. The other layers (endothecium, wall layers, epidermis) are structural and positioned outward from the tapetum.

During seed germination, the radicle (embryonic root) is the first structure to emerge from the seed. The radicle penetrates the soil first to anchor the seedling and begin water absorption. The plumule (shoot) emerges later, while hypocotyl and epicotyl are regions of the stem that develop after the radicle has established.

The apical meristem is the growing tissue located at the tips of roots and shoots, responsible for primary growth in plants. It consists of undifferentiated cells that continuously divide to produce new cells, which then differentiate into various plant tissues. This region is specifically responsible for increasing the length of the plant body, unlike lateral meristems which contribute to secondary growth (width).

Compositae (Asteraceae) family is characterized by head (capitulum) inflorescence, where many small florets are densely packed on a receptacle. Sunflower and daisy are classic examples. Spike, umbel, and cyme are other inflorescence types found in different families.

This is the season of spring when we see many flowers on trees.

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.