What is the relationship between ecosystems and biomes plz and give me full answers pl

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Does masterbation affect height growth or loss of growth hormone?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels