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Sigmoid growth curve define by

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Important Questions on Organisms and Population

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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>Ordinary Thinking>Q 26
Population growth curve in most animals, except humans is
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>Ordinary Thinking>Q 27

Match list I with list II and choose the correct option

  List I   List II
A Pacific salmon fish 1

Verhulst-Pearl Logistic growth
B Nt=N0ert 2 Breeds only once in lifetime
C Oyster 3 Exponential growth
D dN/dt=rNK-NK 4 Many small sized offsprings
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>Ordinary Thinking>Q 29
Rate of human population growth is
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>Ordinary Thinking>Q 30
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>Ordinary Thinking>Q 31
Population density means
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>NCERT>Q 1
Autecology is the
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>NCERT>Q 2
Ecotone is
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NTA Errorless Biology Volume-2>Chapter 17 - Organisms and Population>NCERT>Q 3
Biosphere is