Doubtnut ke saath jaaniye Word Emigrate and Immigrate mein kya difference hai..!!
The given figure represents different factors affecting population density (N) . If B = natality D = mortality , E = emigration and I = immigration, then select the incorrect option regarding these.
If birth rate = B , Death rate = D, Emigration = E, lmmigration = I, then choose the correct match
Which of the following is correct ? I. Migration is the movement of individuals from a population to another population II. Emigration is the migration of individuals out of an area III. Immigration is the migration of individuals into an area IV Gene flow cannot alter the genetic charecteristics of populations
Which of the following contributes to increase in population density ? (a) Natality (b) Mortality (c) Immigration (d) Emigration
A biologist studied the population of rats in a barn. He found that the average natalty was 250, average mortality 240, immigration 20 and emigration 30. The net increase in populations is:
NAVNEET PUBLICATION - MAHARASHTRA BOARD-DISTINGUISH BETWEEN -Organisms and Environment - II
