The idea that earth was the center of the universe is an example of that has long been discarded. a)an observation b)an experiment c)a hypothesis d)a law

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

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result