Which of the following statements is the most accurate? Food can travel up the stem in the phloem
Food can travel down the stem in the phloem
Food can travel up or down the stem in the phloem
Food can travel up or down the stem in the xylem

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

Recommend a strategy for incorporating sustainable human activity into a tropical rain forest biome.