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33 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Asexual Reproduction |
New individual formed from only one parent |
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Sexual reproduction |
New individual from when to parents sex cells unite |
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Fertilisation |
The joining of the male amd female gamete to form a zygote |
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Sepal function |
Protects flower while in bud |
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Petals |
Protect internal parts Attract insects or birds |
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Stamen function |
Produces the pollen Nucleaous in the pollen grain (is the male gamete) |
Male |
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Carapel |
Produces an egg cell Nucleus of egg cell (is the female gamete) |
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Structure of carapel |
Stigma / style / ovary |
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Functions of the stigma |
Where pollen grains land |
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Style functions |
Connects stigma to ovary |
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Ovary |
Contains ovules Ovules produce egg |
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Sturcture of stamen |
Anther / filament |
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Functions of anther |
Makes pollen grains |
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Filament |
Supports the anther Positions thd anther for pollen dispersal |
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Pollination defintion |
The transfer of pollen from the stamen to the carapel |
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Types of pollination |
Wind and insects |
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Zygote |
A cell formed when a male and female gamete join |
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Steps of fertilisation |
1.Pollen lands on the stigma of the carapel 2.Pollen grows a pollen tube through the style 3.pollen tube grows to base of the carpel 4. Pollen nucleus joins with the egg nucleus 5. Ferilisation takes place and forms a zygote |
5 |
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Seed structure |
Testa, plumule, radicle, food supply |
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What is the plumule and the radicle |
Enbryo |
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What will the plumule form |
Shoot |
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What will the radicle form |
Root |
R for r |
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Fruit formed from |
Ovary |
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Dispersal definition |
The carrying of the seed or fruit as far as possible from the parent |
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Why do seds or fruit want to be faraway from parent |
Less competion for resources > better chance for survial |
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Types of dispersal |
Wind, water, animal, self dispersal |
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Wind dispersal |
Small light seeds Special devices to help carry them E.g dandelion, thistle |
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Water dispersal |
Fruit that can float Carried by streams e.g coconut, waterlily |
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Animal dispersal |
Tasty fruit to ensure they got eaten Spines to stick to fur E.g burdock, acorns |
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Self dispersal |
Pods that burst open when ripe, flinging the seeds away E.g garse, peas beams |
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Germination definition |
Formation of a new plant from growth of seed |
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Conditions needed for germiniation |
Water / oxygen / suitable temperature warmth |
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Germination stages |
1.Seed absorbs water. Then root and shoot grow using food in the seed. 2. Root grows down into the soil. 3. Shoots grows up towards the surface. 4. First green leaves appear |
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