Plants reproduce sexually, leading to the formation of seeds.
Name the structure inside the ovary of a flower that contains the female sex cells (gametes).
Explain how a germinating seed is able to grow and survive before it can begin photosynthesis.
A student investigates the environmental conditions needed for cress seeds to undergo germination.
They divide the cress seeds into four groups: P, Q, R, and S. Each group is kept under different conditions as shown in the table below:
| Group | Conditions |
|---|---|
| P | water, oxygen, and a temperature of 4∘C4^\circ\text{C}4∘C |
| Q | water, oxygen, and a temperature of 22∘C22^\circ\text{C}22∘C |
| R | oxygen, no water, and a temperature of 22∘C22^\circ\text{C}22∘C |
| S | water, no oxygen, and a temperature of 22∘C22^\circ\text{C}22∘C |
Suggest one observable change that indicates a seed has successfully germinated.
Explain which group of seeds is likely to germinate first.
