Question

explain plants manage the waste materials

Answer 1

Plants don't have specialised organs for the removal of the waste materials, so they use various techniques for the removal of waste materials.
1. Excess water is removed through stomata by transpiration.
2. They combine the wastes with organic salts to get rid of wastes.
3. Stomata also serve as a excretory organ. During photosynthesis, oxygen is produced as a waste product. 
4.4

Answer 2

1.)plants manage the waste products by
The plants excrete carbon dioxide produced as a waste during respiration only at night time.
2) The plants excrete oxygen as a wasteonly during the daytime.
3.) The plants get rid of wastes by secreting them in the form of gums and resins.
4.) Plants also excrete some waste substances into the soil around them
5.)plants drop fruits and leafs as waste.