Question
List any three important characteristics of a population and explain
✓
Answer
→ Population density : The number of organisms belong to same species in a given time and habitat is called population density.
→ Four basic processes, two of which (natality and immigration) contribute to an increase in population density and two (mortality and emigration) to a decrease.
→ Natality : Natality refers to the number of births during a given period in the population that are added to the initial density.
→ Mortality : Mortality is the number of deaths in the population during a given period.
→ Immigration : Immigration is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.
→ Emigration : Emigration is the number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration.
→ Four basic processes, two of which (natality and immigration) contribute to an increase in population density and two (mortality and emigration) to a decrease.
→ Natality : Natality refers to the number of births during a given period in the population that are added to the initial density.
→ Mortality : Mortality is the number of deaths in the population during a given period.
→ Immigration : Immigration is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration.
→ Emigration : Emigration is the number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What are transgenic animals? How was the first transgenic cow found to be more useful than the normal cow, for humans?
Study the schematic representation of evolutionary history of plant forms given below and mention
- The plant forms ferns and conifers are most related to.
- The nearest ancestors of flowering plants.
- The most primitive group of plants.
- Common ancestry of Psilophyton provides to.
- The common ancestor of Psilophyton and seed ferns.
- The common ancestors of mosses and tracheophytes.
What is the difference between endemic and exotic species?
What effect will the corpus leuteum become inactive on foetus development. Explain with reasons.
What is an ideal contraceptive? Write any five possible side effects of contraceptive measures.
For a layman, both apples and mangoes are 'fruits'. Do you agree? Give reasons in support of your answer.
What is ELISA?
Why are certain groups of bacteria referred to as methanogens? List any two characteristic features of methanogens.
An alien piece of DNA needs to be integrated to a specific sequence of host DNA for its cloning. Is it true? if yes, explain. If this DNA is not picked up by host cells. Can you suggest a reason for it?
Mention the evolutionary significance of the following organisms:
- Shrews.
- Lobefins.
- Homo habilis.
- Homo erectus.