Q2.25. you have performed a litterbag experiment using a 10 g sample of pine needles in a coniferous stand at coweeta. at the end of 0.80 years, the dry mass of your sample is 8.5 g. calculate a value of k from these data. k =

Identify the missing parts of the carbon cycle

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.