What prevents protozoans from bursting when placed in a hypotonic environment?

How does a gymnosperm prevent itself from pollinating the same tree

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?