Based on the work of Nicolas de Saussure, what are the two primary sources of mass for
plants

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

What is the similarities and differences between bacteria and eukaryote?

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups