plants

[joelle]

Why are herbaceous stems green?

[SkepticLance]

Because they contain chlorophyll and carry out photosynthesis.

 

As a general rule, plants will put chlorophyll into any part that receives sunlight, as long as other functions do not prohibit it. A tree cannot put chlorophyll into a stem or branches, since it needs enormous strength to support weight, and only hard tissues that do not pass sunlight can do it.

 

However, a herbaceous plant needs only soft tissues that will pass sunlight, to support it. So it puts chlorophyll there.

[joelle]

thank you so muchh:)