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02. The Flower

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 02. The Flower

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

floral bud

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

pedicel

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

calyx

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

petals

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

androecium

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

anther

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

pollen sacs

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

gynoecium

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

egg

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

accessory

Flowers that have both male and female reproductive organs are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ flowers.

bisexual (or hermaphrodite)

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

dioecious

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

complete

The smallest flowers belong to the _ _ _ _ _ _ _ _ _ _ _ _ _ _ plant.

Duckweed (Wolffia)

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

Rafflesia

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

Cloves

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

pollination

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

self-pollination

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

pollinating agents

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

fragrance

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

water

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

zygote

The fusion of male and female gametes is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

fertilisation

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

fruit, seeds

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

pericarp

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

mesocarp

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

sepals

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

false

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

fleshy

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

seed coat

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

embryo

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

radicle

Seeds that have only one cotyledon are called _ _ _ _ _ _ _ _ _ _ _ _ _ _ seeds.

monocotyledonous (monocot)

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

dispersal of fruits and seeds

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

seed germination

In _ _ _ _ _ _ _ _ _ _ _ _ _ _ germination, the cotyledons remain under the soil.

hypogeal

The three essential conditions required for seed germination are moisture, air, and _ _ _ _ _ _ _ _ _ _ _ _ _ _.

warmth (or suitable temperature)

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