Could a fallen tree in a forest be regarded as an entire ecosystem? explain.

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

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

Were you able to observe the nucleolus in any of the cells if so which ones