Afarmer stops cultivating a large tract of farmland and abandons it. the natural changes taking place soon afterwards, such as the growth of wild grasses and weeds, can be considered secondary succession and not primary succession because

When a farmer stops cultivating farmland and abandons it, the growth of wild grasses and weeds can be considered secondary succession because of the presence of the existing soil. Secondary succession occurs in ecosystem when soil have been disturbed or disrupted by humans such in a way of farming.  Furthermore, the reason why it cannot be categorize as primary succession because primary succession only occurs in essentially lifeless areas, where soil is not capable of sustaining life. Specifically, this is called old-field succession where wild grasses and weeds represents a new plant species to colonize a bare soil after the farmer abandon the farmland.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .