By: oratileshawty • 2 year ago
By: mmyambo • 6 year ago
Some examples from this set of practice questions
1.
What does population mean?
Answer: A group of organisms of the same species inhabiting an area in such proximity that interbreeding can occur.
2.
What are population dynamics?
Answer: The study of changes in populations and the factors that bring these about, as well as the balance of numbers of organisms and the factors maintaining this balance.
3.
List the 3 phases of population growth and what each entails.
Answer: 1. Lag phase - First phase of a growing population. It grows rather slowly as it is still small and in the process of adapting to the environment. 2. Geometric/Log/Exponential Phase - The second phase of a growing population. It increases rapidly as there are few or no limiting factors in operation. Environmental resistance is starting to have an effect. 3. Stationary Phase/Equilibrium - Final phase of growing population. It stabilises due to increasing competition; environmental resistance builds up. This phase starts when the carrying capacity is reached.
4.
What is carrying capacity and when does it occur?
Answer: The maximum size of a population that the environment can support - environmental resistance takes place to control further growth in population. Occurs in the equilibrium phase of population growth.
5.
What is an ecological niche?
Answer: The ranges of physical and biological conditions in which an organism can survive — it determines where the organism lives and how it interacts with other members of the community
6.
What does the term \'fecundity\' refer to?
Answer: An organism\'s fertility
7.
What are biotic factors? Provide examples
Answer: Any living component that affects the population of another organism or the environment. Examples include: Human influence, pathogens and disease outbreaks.
8.
What are abiotic factors? Provide examples
Answer: Any non-living, chemical and/or physical parts of the environment that affect the living organisms and the functioning of eco-systems. Examples include: Storms, natural disasters, types of soil, pH, temperature.
9.
What is a colonising population?
Answer: Populations becoming established in a new area for the first time.
10.
Explain the difference between a species and a community.
Answer: \'Species\' refers to a set of animals/plants in which the members have similar characteristics to each other and can breed with each other to produce fertile offspring, while a \'community\' is a group of living species living in the same space or having a particular characteristic in common.
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