How long does it take for a new activity to improve someone's fitness? Several months A few days A few weeks Several weeks

Hi!

Your answer is: A- Several weeks

Reason being: Your body has to get used to doing the physical activity before realizing what it's doing, and before it begins losing fat/gaining muscle.

Hope this helps!

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 to you question is   jet streams