Which statement is true?
1: Animals only perform cellular respiration, and plants only perform photosynthesis.
2: Animals perform cellular respiration and photosynthesis, but plants only perform photosynthesis.
3: Plants perform cellular respiration and photosynthesis, but animals only perform cellular respiration. Plants perform cellular respiration and photosynthesis, but animals only perform cellular respiration.
4: Plants and animals perform cellular respiration and photosynthesis.