Reproducion in Flowering Plants Flashcards
Asexual Reproduction (2)
- Reproduction where only one parent is involved.
- All offspring have same genetic composition as the parent
Advantages of asexual reproduction (3)
- Large number of offspring produced rapidly
- Low energy expenditure
- Offspring adapted to environment
Disadvantages of asexual reproduction (3)
- Adaption to changing environment difficult
- All offspring share same weaknesses
- Can lead to overpopulation
Sexual Reproduction (3)
- Two parents combine genetic material
- Gametes are porduces via meiosis
- Fertilisation occurs, forming a zygote
Advantages of sexual reproduction (3)
- Offspring have genetic variation, so more adaptable to changing environment
- Forms the basis of evolution
- Chances of inheriting a disease or weak characteristic are decreased.
Disadvantages of sexual reproduction (5)
- Process takes longer
- Fewer offspring produces
- Energy expenditure is high.
- Negative mutations and recessive genes are expressed
- Plants need agents to disperse pollen and seeds
Calyx
Five small, green sepals that protect the flower in the bud stage
Corolla
The petals that attract insects and birds
Androecium (stamens)
The male parts of the plant
Contains pollen sacs in which the pollen is formed
Gynoecium (pistil)
Female part of the flower
Consists of a stigma, a style, and an ovary
Pollination
The transfer of ripe pollen from a male anther to a receptive female stigma
Self pollination
The transfer of ripe pollen from an anther to a receptive stigma of the same flower or other flowers on the same plant
Cross-pollination
The transfer of ripe pollen from the anther of one flower to the receptive stigma of a flower on another plant
Fertilisation
The fusion of male and female gametes in the ovule of the ovary to form a zygote
Edible seeds
Grain, Legumes, and Nuts
