Which of the following investigations is an example of the study of an abiotic factor? see concept 52.1 (page 1167) which of the following investigations is an example of the study of an abiotic factor? see concept 52.1 (page 1167) investigating how an elk population competes for food identifying food sources for an egret population investigating how the amount of annual precipitation affects the distribution of a tree species observing interactions among various organisms in a rainforest canopy the relationship between finch beak size and food availability on two different galapagos islands

investigating how the amount of annual precipitation affects the distribution of a tree species

Explanation:

Abiotic factors are non-living components of the ecosystem such as rainfall, temperature, precipitation and humidity. These abiotic factors have significant impart on the biotic components of the ecosystem.

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.