Saved Bookmarks
| 1. |
Give right answer of the following: (a) Number of births during a given period in the population that are added to initial density : 1 (b) Number of deaths in the populations in a given period: 2 (c) Number of individuals of the same species that have come into the habitat from elsewhere during a given time period: 3 (d) Number of individuals who left habitat and gone elsewhere during a given time period: 4A. 1`-`mortality, 2`-`natality, 3`-`emigration, 4`-`immigrationB. 1`-`mortality, 2`-`natality, 4`-`emigration, 3`-`immigrationC. 2`-`mortality, 1`-`natality, 3`-`emigration, 4`-`immigrationD. 2`-`mortality, 1`-`natality, 4`-`emigration, 3`-`immigration |
|
Answer» Correct Answer - D 1) Whatever might be the ultimate reason, the density of a population in a given habitat during a given period flucuates due to change in four basic process. 1) Natality, 2) Mortality, 3) Immigration and 4) Emigration. 2) Two of three processes (natality and immigration) contribute an increase in population density and two of which (mortality and emigration) to a decrease. 1) Natality [B]: Number of births during a given period in the population that are added to inital density. 2) Mortality [D]: Number of deaths in teh population in a given period. 3) Immigration [I]: Number of individuals of the same species that have come into the habitat, from elsewhere during a given tiem period. 4) Emigration [E]: Number of individuals who left habitat and gone elesewhere during a given time period. |
|