The diagrams show some different seeds. Copy and complete the table by naming the type of seed dispersal. Then describe the features that allow each seed to be dispersed in this way. The first one has been done for you.
Type of seed
Type of seed dispersal
Features of seed that help dispersal
dandelion
wind
The seed has a parachute that catches the wind
Sandbur
tomato
Important Questions on Sexual Reproduction in flowering Plants
The sea bean grows on the banks of rivers in Africa, Australia and South America. Its seeds form inside large woody pods. The pods drop into the river and float away.
Name the type of seed dispersal used by the sea bean. (Water/ Wind/ Animals)
The diagram shows the life cycle of a tomato plant.
Describe the processes that take place in the life cycle of a tomato plant. Use the diagram to help you.
Moninder wants to find out the best temperature for mustard seeds to germinate. He uses three Petri dishes. Each dish has a layer of moist tissue paper covered with 30 mustard seeds. Moninder puts one dish in a warm cupboard, one in a cool cupboard and one in a refrigerator. He waters all of the seeds regularly for 21 days. His results for the first four days are shown in the table.
| Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | |
| Day 1 | Day 2 | Day 3 | Day 4 | |
| Warm cupboard | 0 | 5 | 20 | 24 |
| Cool cupboard | 0 | 2 | 8 | 14 |
| Refrigerator | 0 | 0 | 0 | 0 |
How many seeds had germinated by day 4 in the warm cupboard?
Moninder wants to find out the best temperature for mustard seeds to germinate. He uses three Petri dishes. Each dish has a layer of moist tissue paper covered with 30 mustard seeds. Moninder puts one dish in a warm cupboard, one in a cool cupboard and one in a refrigerator. He waters all of the seeds regularly for 21 days. His results for the first four days are shown in the table.
| Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | |
| Day 1 | Day 2 | Day 3 | Day 4 | |
| Warm cupboard | 0 | 5 | 20 | 24 |
| Cool cupboard | 0 | 2 | 8 | 14 |
| Refrigerator | 0 | 0 | 0 | 0 |
What conclusion can you draw from Moninder's results?
Moninder wants to find out the best temperature for mustard seeds to germinate. He uses three Petri dishes. Each dish has a layer of moist tissue paper covered with 30 mustard seeds. Moninder puts one dish in a warm cupboard, one in a cool cupboard and one in a refrigerator. He waters all of the seeds regularly for 21 days. His results for the first four days are shown in the table.
| Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | Number of germinated mustard seeds | |
| Day 1 | Day 2 | Day 3 | Day 4 | |
| Warm cupboard | 0 | 5 | 20 | 24 |
| Cool cupboard | 0 | 2 | 8 | 14 |
| Refrigerator | 0 | 0 | 0 | 0 |
Explain why no seeds germinated in the refrigerator.
