Plants respire all the time, whether it is dark or light, because their cells need energy to stay alive. But they can only photosynthesize when they have light.
The oxidation of water occurs during photosynthetic electron transport during the light reactions of photosynthesis. In the absence of a source of light energy (dark reactions have no direct requirement for light energy), oxygen is not produced.
I think the correct answer from the choices listed above is option C. It is the polymerase chain reaction techniques that is used by researchers to carry out DNA replication in vitro. It is a technique used in molecular biology to amplify copies of a piece of DNA.
Open the cage, haha. On a serious note if the bird isn't trained you should block the exit with your hand so you can capture it and it doesn't fly away.
25% chance because when you do a Punnett square for your genes you find that only 1 of 4 are tt and 2 are TT and one is Tt so the percentage for the plant to be short would be 25%