A full, comprehensive deck of flashcards on each GCSE Edexcel Biology 9-1 topic.
| Front | How can humans increase the amount of nitrates available for plant uptake? |
| Back | . Through the use of fertilisers, which contain/release nitrates. By crop rotation, where every few seasons, farmers grow plants with nitrogen fixing bacteria in their roots and dig the roots back into the soil after the crop is harvested to increase the amount of nitrates ready for the next crop |
| Front | What hormone do the ovaries release? |
| Back | Oestrogen |
| Front | What is environmental variation? |
| Back | Different characteristics caused by an organism’s environment |