Based on the diagram, which pair of organisms are MOST CLOSELY related, and why? A
Humans and squirrels, because they have three bones in their middle ears.
B
Sea sponges and flatworms, because they have a bilateral body plan.
C
Lizards and flatworms, because they have a bilateral body plan.
D
Sea sponges and trout, because they are multicellular

the answer is d (apex) good luck : ))

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.

the answer you are looking for is the united states forest service.

hope this !