Question

Solve the crossword puzzle with the help of given clues.

ACROSS

$1 .$ Vegetative propagation by modified underground stem. $(6)$

$2 .$ Fusion of an egg in the ovule with the male gamete. $(13)$

$3 .$ Vegetative propagation by modified roots. $(7)$

$4 .$ Multiply rapidly by fragmentation. $(5)$

$5 .$ Concentrated solution of sugars produced in flowers. $(6)$

DOWN
$6 .$ Reproduces by budding. $(5)$

$7 .$ Grows fast, moves into the soil forming the root. $(7)$

$8 .$ Transfer of pollen grains from the anther of the stamen to the stigma of the pistil. $(11)$

$9 .$ The technique used in producing different modified varieties of fruits and flowers. $(8)$

$10 .$ Its fruit have hooks and spines on their body. $(8)$

Accepted Answer

ACROSS

$1 .$ Tubers, such as potatoes, are fleshy underground storage structures composed of enlarged parts of the stem. A tuber functions in asexual propagation as a result of the tiny scale leaves equipped with buds that grow on its surface. Each of these buds can form a new plant, genetically identical to the parent.

$2 .$ The fusion of an egg and male gamete produce zygote. This is called fertilisation.

$3 .$ Dahlia can be propagated from seeds, tubers, or cuttings. Seeds will produce varieties different from the parent plants, so propagation from seeds is used primarily to develop new cultivars.

$4 .$ In multi-cellular organisms with relatively simple body organisation, simple reproductive methods can still work. Spirogyra, for example, simply breaks up into smaller pieces upon maturation. These pieces/fragments grow into new individuals.

$5 .$ Plant nectar from flowers is a carbohydrate-rich food resource for animals and can be a reward provided by plants in exchange for pollination services.

DOWN

$6 .$ The small bulb-like projection coming out from the yeast cell is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells. Sometimes, another bud arises from the bud forming a chain of buds. If this process continues, a large number of yeast cells are produced in a short time.

$7 .$ A seed is a ripened ovule developed after fertilisation. It consists of an ‘embryo’ and stored food material, both of which are enclosed in a special covering known as ‘seed coat’. Plants germinate from seeds when they are provided with favourable growing conditions.

$8 .$ Insects like bees/butterflies visit flowers and carry away pollen on their bodies. Some pollen lands on the stigma of a flower of the same kind. The transfer of pollen from the anther to the stigma of a flower is called pollination.

$9 .$ Grafting is a technique where the desired plant scion is inserted into a cut stem of a rooted plant stock to produce different modified varieties of fruits and flowers.

$10 .$ Some seeds are dispersed by animals, especially spiny seeds with hooks which get attached to the bodies of animals and are carried to distant places. Example: Xanthium

Important Questions on Reproduction in Plants

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