The by-product of photosynthesis is oxygen, which is added to our atmosphere. plants also respire; creating atp, the energy they need to continue to grow, develop and reproduce. imagine it is summer; there is a drought. how will the summer drought influence the model we see here? a) in a response to the drought, stomata will open more frequently. there will be higher outputs of co2 and o2 as a result. b) an increase in temperature will cause an increase in chemical activity. there will be increases in all chemical inputs and outputs in the model. c) water will be a limiting reactant in the model. as a result, less glucose will be produced. there will be less co2 in and o2 and h2o out. d) water will be a limiting reactant in the model. there will be less h2o in through the roots and less h2o out via transpiration. the other inputs and outputs will remain constant.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.