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Erstellt von Samira Alnougi
vor fast 9 Jahre
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Frage | Antworten |
What is asexual reproduction? | It is the formation of an offspring from only one parent. |
Give an example of asexual reproduction in a plant | strawberry plants produce stems called runners which grow from the base of the parent plant. The runner forms new roots and a new shoot so new strawberry plants are produced from one parent plant. |
What is sexual reproduction? | Involves two sex cells (gametes) joining together. |
What is pollination? | The transfer of pollen from a stamen to a carpel |
Function of the sepals | protects the flower when its a bud |
Functions of petals | protect the reproductive parts and attract insects |
Function of carpel | Carpels produce egg cells which contain the female gametes |
Function of stamens | Stamens produce pollen grains which contain the male gametes |
what does a carpel consist of | - A stigma for pollen grains to land on - A style which connects the stigma to the ovary - An ovary which contains 1 or more ovules |
What does a stamen consist of | - A filament which supports the anther - An anther which produces pollen |
What does sexual reproduction in plants involve | -pollination -fertilisation -seed and fruit formation -seed and fruit dispersal -germination |
What is pollination | the transfer of pollen from a stamen to a carpel |
What are the 2 methods of pollination | wind pollination insect pollination |
what is fertilisation | the joining of the male and female gametes to form a zygote |
What does the pollen tube allow | it allows the male gamete to pass down the female gamete in the carpel |
what does a seed consist of and what are the functions | -plumule:forms the shoot of the adult plant -radicle:forms the roots of the adult plant -a food supply around the embryo -Testa:a coat aroud the seed |
What is seed and fruit formation | After fertilisation the fertilised ovule becomes the seed At the same time the petals sepals and stamens fall off the flower The ovary swells to become the fruit |
What is seed and fruit dispersal? | it is the carrying of seeds or fruit as far as possible from the parent plant |
What are the 4 main methods of dispersal | wind animal self water |
What is Germination | the growth of a seed to form a new plant |
What are the conditions necessary for germinaion | water oxygen warmth (WOW) |
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