Pearson | PTE
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Population & Its Attributes: Population Size or Density, Population Attributes - Age Pyramid, Population Attributes - Population Growth is considered one of the most asked concept.
49 Questions around this concept.
Population attribute having a ratio of male to female named:
It is much easier for a small animal to run uphill than for a large animal, because:
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality was 240, immigration was 20 and emigration was 30. The net increase in population is:
Population attribute is/are
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
Pollen tablets are available in tha market for:
Pollution refers to:
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Order of different age group in the urn-shaped age pyramid for human population will be
Natality refers to
In a pond, last year there were 30 lotus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are ________ and ________ individuals per lotus every year.
Population Size or Density:
1. Birth Rate or Natality:
2. Death Rate or Mortality:
3. Sex Ratio:
Expansive Pyramid:
Stationary or Stable Pyramid:
Constrictive or Declining Pyramid:
Where,
N = Population density
t = Time,
B = Birth rate,
I = Immigration,
D = Death rate,
E = Emigration
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