Answer key

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 02. The Flower

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The largest known flower, measuring about 1 metre in diameter, is the Rafflesia.

The baby plant in an inactive stage within the seed is known as the embryo.

The outermost whorl of a flower, formed of sepals, is known as the calyx.

Calyx and corolla are called accessory whorls because they help in pollination but not directly in reproduction.

In hypogeal germination, the cotyledons remain under the soil.

The smallest flowers belong to the Duckweed (Wolffia) plant.

The fruit wall, which develops from the ovary wall, is called the pericarp.

The three essential conditions required for seed germination are moisture, air, and warmth (or suitable temperature).

Cloves are dried floral buds used for flavouring food and as medicine.

The female gamete contained within an ovule is called the egg or ovum.

The process of transfer of pollen grains from the anther to the stigma of a flower is called pollination.

The innermost whorl of a flower, formed of the pistil, is the gynoecium.

Apple, Pear, and Strawberry are examples of false fruits because their fleshy part forms from the thalamus.

The young root part of the embryo that grows into the root system is the radicle.

Flowers that have all four whorls present are known as complete flowers.

The distribution of fruits and seeds away from the parent plant is called dispersal of fruits and seeds.

The male reproductive whorl of a flower is called the androecium.

In aquatic plants like Vallisneria, pollen grains are transferred by water.

The yellow powdery pollen grains are formed in the pollen sacs of the anther.

When pollination occurs in flowers on the same plant, it is called self-pollination.

The stalk that attaches a flower to the stem or branch is called the pedicel.

Seeds that have only one cotyledon are called monocotyledonous (monocot) seeds.

The fusion of male and female gametes is called fertilisation.

The so-called dry fruits such as Almond and Pistachio are actually fleshy fruits that are dried before use.

The brightly coloured parts of a flower that attract insects for pollination are called petals.

After fertilisation, the ovary develops into a fruit and the ovules develop into seeds.

Each stamen consists of a long, thread-like filament and a bilobed, sac-like anther.

In cross-pollination, pollinating agents like wind, water, insects, or animals are needed.

The process by which the dormant embryo in a seed becomes active and grows into a seedling is called seed germination.

A flower is the most attractive and colourful part of a flowering plant and develops from the floral bud.

The protective outer covering of a seed is called the seed coat.

In fruits like tomato, brinjal, and lady’s finger, the sepals do not fall off even after fruit formation.

After the fusion of male and female gametes, a zygote is produced.

Wind-pollinated flowers are typically colourless or dull, tiny, and without fragrance.

Plants bearing male flowers in one plant and female flowers on another plant are said to be dioecious plants.

Flowers that have both male and female reproductive organs are called bisexual (or hermaphrodite) flowers.

In fleshy fruits like mango, the sweet, pulpy middle layer of the pericarp is called the mesocarp.

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