Botany and Plant Science

Apical meristems are situated at the tips of the root and shoot. They take part in initial growth.

No, it is not true because all plants show primary growth. Primary growth is the growth that occurs as a result of cell division at the tips of stems and roots, and gives rise to primary tissue.

Nageli discovered meristems as well as complex permanent tissues (xylem and phloem).

Pollinators are organisms or agents that transfer pollen from the male anther to the female stigma. Gametes are the reproductive cells themselves, anthers produce pollen, and pollination is the overall process.

After fertilization, the ovule develops into the seed which contains the embryo, while the ovary develops into the fruit.

After fertilization, the ovary develops into the fruit which protects the seeds and aids in their dispersal, while the ovules become the seeds inside.

The carpel (also called pistil) is the female reproductive part of a flower, consisting of stigma, style, and ovary. The stamen is the male reproductive part, while sepals and petals are protective and attractive structures respectively.

The stigma is the uppermost part of the pistil/carpet and is specifically adapted to capture and receive pollen grains. The anther produces pollen, style connects stigma to ovary, and ovary contains ovules.

Self-pollination occurs when pollen from anther lands on the stigma of the same flower. Cross-pollination involves different flowers, and 'pollination' is the general term for the process.

When a pollen grain lands on a compatible stigma, it absorbs moisture and germinates to produce a pollen tube that grows down the style to deliver sperm cells to the ovule. The zygote forms later after fertilization, embryo sac is within the ovule, and ovary is the fruit precursor.

Pollen grains are the male gametophytes of flowering plants and are produced in the anther, which is the fertile part of the stamen. The anther contains microsporangia where pollen mother cells undergo meiosis to form pollen grains.

Sepals (calyx) and petals (corolla) are the non-essential or accessory parts of a flower. Sepals protect the flower bud, while petals attract pollinators. The essential parts are stamens (male) and carpels (female), which are directly involved in reproduction.

Papaya (Carica papaya) is a dioecious plant, meaning individual plants bear either male or female flowers, not both. This is called unisexual or imperfect flowers. Hibiscus and mustard have bisexual (perfect) flowers containing both male and female parts, while pine is coniferous with different reproductive structures.

Bryophyllum reproduces vegetatively through its leaves. The leaf margins have notches that contain adventitious buds, which can develop into complete plantlets. When these leaves fall on moist soil, each bud can grow into an independent plant. This is why Bryophyllum is commonly used to demonstrate vegetative propagation in biology classes. Roots, stems, and flowers are not the primary vegetative propagation organs for this plant.

Bryophyllum reproduces vegetatively through epiphyllous buds that develop in the notches of its leaves. These buds grow into small plantlets when the leaf falls on moist soil, enabling asexual reproduction.