Reproduction In Plants Flashcards
Why do living things reproduce?
Living things reproduce to ensure continuity of their kind
What do the male parts of the flower consist of?
The anther, and the filament.
What do the female parts of a flower consist of?
The stigma, style, ovary, and ovule.
True or False:
The anther contains pollen grains.
True
True or False:
The anther supports the filament.
False.
The filament supports the anther.
Which part of a flower contains male reproductive cells?
The pollen grains.
What is contained in the ovary?
Ovules.
What connects the stigma to the ovary?
The style.
True or False:
The ovules contain eggs.
False:
The ovules contain egg cells
True or False:
Some plants have both male and female parts in the same flower.
True.
True or False:
Some plants have either male or female parts inside single flower.
True.
What are the four processes involved in the reproduction of flowering plants?
- Pollination
- Fertilisation
- Dispersal
- Germination
True or False:
Parents pass on their characteristics to their young when they reproduce.
True.
What is pollination?
Pollination is the process by which pollen grains from the anther are transferred to the stigma of a flower.
True or False:
Flowers can be pollinated by insects and birds.
True.
True or False:
Wind cannot pollinate flowers.
False. Some pollen grains are transferred by wind.
What is the difference between self-pollination, and cross-pollination?
Self-pollination within the same flower, or across flowers on the same plant.
Cross-pollination occurs across flowers from different plants of the same kind.
True or False:
Plants of different kinds
can reproduce through cross-pollination.
False.
Cross-pollination occurs across flowers from different plants of the same kind.
What is fertilisation?
Fertilization is the fusion of the male reproductive cell with the egg cell.
What happens to pollen grains when they land on the surface of the stigma?
Each pollen grain produces a pollen tube.
Where do pollen tubes:
1. grow from?
2. pass through?
3. head towards?
Pollen tubes grow:
1. down from the stigma,
2. through the style,
3. to the ovary.
True or False:
When the pollen tube reaches the the ovule, the female reproductive cell in the pollen tube fuses with egg cell.
False:
The pollen tube carries the male productive cell.
True or False:
After fertilisation, most of the flower parts usually wither drop off
True.
True or False:
After fertilisation, the ovary develops into seeds.
False.
The ovary enlarges and becomes a fruit, while the ovules in it develop into seeds.
What is sexual reproduction in flowering plants?
The formation of new plants from seeds that involves the fusion of male and female reproductive cells.
What is dispersal?
The scattering of fruits or seeds is called dispersal.
True or False:
Plants scatter or disperse their seeds as near as possible.
False.
Plants need to ensure their seeds are dispersed as far away as possible.
What happens when plants grow too closely together?
They compete for sunlight, water, and minerals.
Name 4 methods of fruit/seed dispersal.
- Animal dispersal
- Water dispersal
- Wind dispersal
- Splitting /Explosive action
What is germination?
Germination is when, given suitable conditions, seeds develop into young plants.
What do seeds need to germinate?
- Air
- Water
- Suitable temperature
Which part of the baby plant grows first?
The root.
Does a baby plant make its own food?
No. A baby plant is unable to make its own food.
Where do baby plants get their nutrients from?
Baby plants get their nutrients from the food stored in its seed leaves.
When does a young plant start making its own food?
A young plant makes its own food ater it develops leaves
How do non-flowering plants reproduce?
They produce spores which can grow into new plants.
True or False:
Spores are microscopic.
True.
What is the main way in which spores are dispersed?
Spores are mainly dispersed by wind.
Describe 3 ways in which animals aid in dispersal
- Seeds are discarded by animals after eating the fruit.
- Eaten seeds are passed out in animal droppings.
- Seeds with bristles, sticky hairs, or hooks are dispersed by sticking to animal fur, or human clothing.
Name some features that fruits or seeds might need for water dispersal.
They should be waterproof, and should float in water.
How do some fruits/seeds use wind dispersal?
They are usually light and small, easily carried by wind.
Some have wing-like structures that help them stay longer in the air.
What is splitting / explosive action?
It is when fruits split open to shoot their seeds in different directions.
True or False:
Splitting / Explosive action only happens when fruits are ripe.
False:
Some fruits split open only after they have dried up.
