Randall and rachel are brother and sister. randall does not enjoy exercising, but rachel can't get enough. based on the information you know, which of the following statements is true?

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

Environmental differences within ecosystems are generally caused by

Moving down the ramp from 6 meters to