The students hypothesis would be something like:
"I believe that some seeds must be exposed to cold before they germinate."
But what the student is missing is some samples from seeds that are not exposed to cold, since they are trying to figure out whether the seeds should be exposed to cold or not.
I see pictures above , what do you exactly need help with?
>Temperature
>Soil
I think so..................
Answer:
Cyanobacteria, Anabaena and Azotobactor are called Nitrogen fixing bacteria. These bacteria change the nitrogen in the atmosphere into a form that is used by the plants to make proteins. Plants take nitrogen in the form of nitrates. The atmospheric nitrogen is first converted into ammonia after that ammonia is converted into nitrates and this nitrates use by the plants to make proteins.
