Apopulation’s emigration in one month totaled three individuals. during the same period, immigration was 17 individuals. birth rate was 12, and mortality was 26 due to a parasite infection. what was the net effect on the population?
a) -14
b) 0
c) +12
d) +26

b) 0

Explanation:

Given that:

Emigration = 3, Immigration = 17, Birth = 12, and Mortality = 26

Net effect on the population, which is the change in population, can be calculated using the formula (Births + Immigration) - (Mortality + Emigration)

Therefore, Net effect = (12 + 17) - (26 + 3)

                                   = 29 – 29

                                   = 0

The net effect on the population is 0. There is no increase or decrease in the total population

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.