1. what biotic features do you see in this photo?
2. what abiotic features can you detect in this photo?
3. in what ways does one biotic factor interact with the abiotic features?
4. pick one biotic feature and dramatically change it. how does it affect the aquarium?
5. pick one abiotic feature and dramatically change it. how does it affect the aquarium?

me i am totally lost i really need you right now.

they are known to reach a speed of 21 miles per hour

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.