3608073
Description
Flashcards by Samira Alnougi, updated more than 1 year ago
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Created by Samira Alnougi
about 9 years ago
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| Question | Answer |
| 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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