The problem of photorespiration is overcome in C4 plants by a two-stage strategy that keeps CO 2 high and oxygen low in the chloroplast where the Calvin cycle operates. The class of plants called C3-C4 intermediates and the CAM plants also have better strategies than C3 plants for the avoidance of photorespiration.his loss to the system is why C3 plants will outperform C4 plants if there is a lot of water and sun. The C4 plants make some of that energy back in the fact that the rubisco is optimally used and the plant has to spend less energy synthesizing rubisco.
1 There are around 200 billion stars in the Milky Way alone.  VY Canis Majoris is the largest known star in our galaxy, if this star was in the center of our solar system its outer atmosphere would reach the orbit of Saturn.
The closest star to our solar system is currently Proxima Centauri. Proxima is a small, red M dwarf only about half as hot as the Sun and 14% as wide. Itâs member C of the Alpha Centauri system, a triple-star system that lies just over 4 light-years away. And now, astronomers say, theyâre sure Proxima Centauri has a planet.