Life cycles in plants (still in progress!)
Main points:
- Need air, water and sunlight to grow
- Green plants need sunlight water and carbon dioxide (CO2) to photosynthesize
- Supplies food for the plant, and oxygen for other organisms
- Some plants aren’t green but still contain chlorophyll
- Supplies food for the plant, and oxygen for other organisms
Grown from seeds:
- Seed germinates and grows into a seedling
- Seedling gets food from seed
- Leaves develop and are exposed to sunlight → photosynthesis
- Develops into young plant, then an adult plant with flowers
- Flowers develop into fruits (containing seeds) through pollination and fertilisation
- Seeds in fruits get dispersed through various methods
grown from bulbs:
- Bulb: short, tear drop shaped underground stem
- Formed by layers of thick, fleshy leave which surround a central bud where roots grow from
- Shoot grows from the central bud, supplied with food stories inside the bulb
- Leaves of shoots rise above ground and are exposed to sunlight → photosynthesis
- Produces a stem, leaves and flowers
- Excess food is transported to underground stems to form new buds
- Leaves and stem dies when main bulb dies, but new bulbs remain
- Remaining bulbs can be separated and replanted to produce new plants
- New plants from seeds also grown