Hyenas and lions have fierce battles over food . which type of relationships does this describe

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 these resources is used worldwide to make construction products, pottery, and porcelain

In what for do plants utilize nitrogen? why do they need nitrogen?