Botany and Plant Science

Suckers originate from axillary buds located at nodes, which can develop into new aerial shoots that emerge from the base of the plant. They are lateral branches, not arising from terminal buds or stem tips. While they do arise from nodes, the most specific answer is axillary bud since that's the meristematic tissue that actually gives rise to the sucker.

Roots lack axillary buds, which are characteristic of stems. Roots have no nodes or internodes, no leaves, and no buds - these are stem features. Root hairs are present in the zone of maturation for water absorption. The absence of axillary buds is a key feature distinguishing roots from stems.

Bracteoles are correctly defined as small, thin bract-like structures present on the pedicel (flower stalk). An involucre is a whorl of bracts (not bracteoles) typically found at the base of an inflorescence. Sepals are usually green, not brightly colored - that's the role of petals. Epicalyx is indeed arranged on the thalamus, but the question asks which statement is correct, and only (b) is fully accurate.

Guard cells are the specialized kidney-shaped cells that surround each stoma and control its opening and closing through changes in turgor pressure. Hydathodes are involved in guttation (water secretion), bulliform cells aid in leaf rolling in grasses, and epidermal cells are the general pavement cells forming the outer layer. The distinctive kidney shape is unique to guard cells in dicot leaves.

The tap root system develops from the radicle (embryonic root) of the seed, making it embryonic in origin. Fibrous roots develop from the base of the stem (adventitious), and prop roots are adventitious roots providing support.

A runner is a weak stem that grows horizontally on the soil surface, producing new plants at nodes (e.g., grass, strawberry). Stolons are similar but grow above ground. Twiners climb by coiling around supports. Suckers grow from the base.

The tap root system is called the normal root system because it develops from the radicle (the normal embryonic root) and is the most common type in dicots. Adventitious roots arise from non-root tissues, prop roots provide support, and fibrous roots are a modification of tap roots.

The radicle is the embryonic root in the seed that emerges first during germination and develops into the primary root system. The plumule becomes the shoot, hypocotyl is the region below the cotyledonary node, and cotyledons are seed leaves.

In palmately compound leaves, all leaflets radiate from a single point at the tip of the petiole (like fingers from a palm). Pinnately compound leaves have leaflets arranged along a central rachis, while the terms reticulate and parallel refer to venation patterns, not leaf arrangement.

Adventitious roots develop from any plant part other than the radicle (embryonic root), such as stems, leaves, or branches. Roots from radicle or primary root are normal roots, not adventitious. The underground part of a plant could be roots themselves or underground stems.

A bisexual (hermaphrodite) flower contains both male (androecium - stamens) and female (gynoecium - pistils/carpels) reproductive parts. Monoecious plants have separate male and female flowers on the same individual, dioecious plants have them on separate individuals, and polygamous refers to plants with multiple sexual conditions.

Tepals are the individual segments of the perianth when sepals and petals are undifferentiated (similar in appearance and color), as in lilies and tulips. Petals are the inner whorl, sepals are the outer whorl, and pistil is the female reproductive organ - none describe perianth segments.

Glycitein is an O-methylated isoflavone which accounts for 5-10% of the total isoflavones in soy food products. Glycitein is a phytoestrogen with weak estrogenic activity, comparable to that of the other soy isoflavones.

In a typical angiosperm, 4 pollen sacs are present in the anther.

The microsporogenesis takes place at anther.