Botany and Plant Science

A complete flower must have all four whorls: sepals, petals, stamens, and pistils. If it is missing a male or female part, it is incomplete.

A perfect flower must contain both male and female reproductive parts. If it is missing either, it is considered imperfect (or unisexual).

Pollination is the transfer of pollen to the stigma. Fertilization occurs only when the pollen tube grows down the style and the male gametes fuse with the ovule. If the pollen is stuck in the style, fertilization has not occurred.

The terminal bud is located at the apex or tip of the stem and is responsible for primary growth in length.

Lenticels are small, porous openings in the bark of stems and roots that facilitate gas exchange between the internal tissues and the atmosphere. Xylem transports water, while nodes and internodes are structural regions of the stem.

Dioecious plants have male and female flowers on separate individual plants. Monoecious plants have both on the same plant.

Monoecious plants possess both male and female reproductive structures on the same individual plant. Dioecious plants have these structures on separate plants.

Leaves are the primary site of photosynthesis, where plants convert light energy into chemical energy (food). While other parts may contain chlorophyll, leaves are specialized for this process.

The four primary vegetative and reproductive parts of a typical angiosperm are the roots, stems, leaves, and flowers.

An internode is the section of a plant stem located between two successive nodes, which are the points where leaves or buds attach.

In dicotyledonous stems, vascular bundles (xylem and phloem) are arranged in a distinct ring pattern around a central pith. Monocots have scattered bundles.

The two primary types of root systems found in plants are taproot systems (one main root) and fibrous root systems (many branching roots of similar size).

The apical meristem is the region of actively dividing cells at the tip of the root, responsible for primary growth and the development of new root tissues.

Dicotyledonous plants typically have flower parts in multiples of four or five, whereas monocots typically have parts in multiples of three.