2006-11-06 02:49:41 · 8 answers · asked by Julie 1 in Science & Mathematics ➔ Botany
In general, plants give off oxygen when there is sunlight for photosynthesis. They respire all the time (use up oxygen), but during the day this is outweighed by the oxygen they produce.
Some plants use CAM photosynthesis which changes the answer. They are able to close their stomata (pores) day and night during harsh conditions. This means that though they are photosynthesising, no oxygen is being released. They're just using it up internally. They can't do this forever, but it does mean they can have periods of no oxygen release. Some desert and tree-dwelling plants use this system.
2006-11-06 09:33:22 · answer #1 · answered by Polenth 2 · 1⤊ 0⤋
Plants Give Off
2016-10-18 11:07:59 · answer #2 · answered by fawaka 4 · 0⤊ 0⤋
Plants give out Oxygen only during day times, because it can use Sunlight and carbondioxide and produce oxygen. During night times plant uses oxygen and liberates carbon dioxide.
2006-11-07 06:06:39 · answer #3 · answered by Sharada B 3 · 0⤊ 0⤋
When you aren't looking/when you are in bed sleeping. If you pretend to sleep you'll actually hear the plants sigh out that oxygen, but make sure that they don't suspect anything or you wont hear a thing.
You can try to force the plant to emit oxygen with a gun, however sometimes they play stupid, and pretend not to know what you are on about.
Keep at it, and good luck!
2006-11-06 02:59:11 · answer #4 · answered by dane 4 · 1⤊ 0⤋
Oxygen is one of the by-products of photosynthesis. So, any time a plant is converting sunlight and carbon dioxide to energy, oxygen is being produced.
2006-11-06 02:59:58 · answer #5 · answered by Jared Z 3 · 0⤊ 0⤋
It gives off oxygen only will it perform photosynthesis which during the day where light is present. It can perform photosynthesis even if in the night but light is needed maybe from a lamp or any light source.
2006-11-06 02:58:45 · answer #6 · answered by know more 1 · 0⤊ 0⤋
at the end of each photosynthetic reaction
2006-11-06 02:53:13 · answer #7 · answered by t_roy_e 3 · 0⤊ 0⤋
More or less constantly.
2006-11-06 02:52:58 · answer #8 · answered by Anonymous · 0⤊ 1⤋