Ascientist hypothesizes that all trees in warm areas produce flowers before the rainy season begins. which is a limitation to
testing this hypothesis?
a) rainy season varies around the world.
b) geographical location of warm areas is very large.
c)flowers of different trees are different colors.
d)sample of trees is restricted to warm areas.
areas

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.

tissue

explanation:

it is actually formed by geoup of cells which is tissue