Plants do not have a digestive system like us. why do they not need a digestive system?-

 

 

http://www.meritnation.com/ask-answer/question/plants-do-not-have-a-digestive-system-why-is-it-not-necessar/nutrition-in-plants/2915633

 

 

 

The best I can do is offer you the following link https://en.wikipedia.org/wiki/Plant_nutrition

 

The three methods of how plants uptake nutrients through their roots can be found there.

 

(Sorry I cannot really help you as this is far from my sphere of knowedge)

I can also only suggest this website but overall I think that some plants do have digestive systems but not all. This should explain some of it:

https://www.quora.com/Why-dont-plants-need-a-digestive-system

Yep as you guys point out, some plants have digestive systems. Interesting topic.

 

http://www.scientificamerican.com/article/how-does-the-venus-flytra/

 

I wonder if being a heterotroph is considered more evolutionarily advanced than being an autograph. I guess it depends on which form of nutrient acquisition is more efficient in a particular circumstance.

Many heterotrophic plants actually do not have digestive systems, they obtain nutrients from their host/partners parasitically (e.g. mistletoe or dodder) or symbiotically (e.g. lichen or mycorrhiza). Carnivorous plants are usually an adaptation to nitrogen limited soils.