B4 AQA GCSE Bioligy Flashcards
What is a community in ecological terms?
A community is a group of different species that live together in the same area and interact with each other.
True or False: A population consists of individuals of the same species living in a specific area.
True
Fill in the blank: The __________ includes all the living organisms in a specific area.
community
What is the role of producers in an ecosystem?
Producers convert sunlight into energy through photosynthesis, forming the base of the food chain.
What are consumers?
Consumers are organisms that obtain energy by feeding on other organisms.
Define the term ‘keystone species’.
A keystone species is a species that has a disproportionately large effect on its environment relative to its abundance.
Multiple Choice: Which of the following is a primary consumer? A) Grass B) Rabbit C) Fox
B) Rabbit
What is the difference between autotrophs and heterotrophs?
Autotrophs produce their own food, while heterotrophs obtain food by consuming other organisms.
True or False: Decomposers break down dead organic matter and recycle nutrients back into the ecosystem.
True
What is a trophic level?
A trophic level is a position in a food chain or food web that indicates the flow of energy and nutrients.
Fill in the blank: In a food chain, energy decreases as you move up to higher __________.
trophic levels
Define ‘biodiversity’.
Biodiversity refers to the variety of life in a particular habitat or ecosystem.
Multiple Choice: Which factor does NOT affect community structure? A) Climate B) Soil type C) Individual behavior
C) Individual behavior
What is ecological succession?
Ecological succession is the process by which ecosystems change and develop over time.
True or False: Primary succession occurs in lifeless areas where soil has not yet formed.
True
What is a climax community?
A climax community is a stable and mature community that undergoes little change in species composition.
Fill in the blank: __________ species are species that are introduced to a new habitat and can disrupt the local ecosystem.
Invasive
What is the significance of food webs in ecosystems?
Food webs illustrate the complex interconnections between different species and their roles in energy transfer.
Multiple Choice: Which is an example of a secondary consumer? A) Grasshopper B) Owl C) Plant
B) Owl
Define the term ‘habitat’.
A habitat is the natural environment in which a species or community of species lives.
What is the impact of habitat destruction on biodiversity?
Habitat destruction leads to loss of species and decreased biodiversity.
True or False: Symbiotic relationships can be beneficial, harmful, or neutral.
True
What is mutualism?
Mutualism is a symbiotic relationship where both species benefit from the interaction.
Fill in the blank: __________ is the process by which species evolve and adapt to their environment over time.
Natural selection
What is an ecosystem?
An ecosystem is a community of living organisms interacting with their physical environment.
Multiple Choice: Which of the following is a biotic factor? A) Water B) Temperature C) Plants
C) Plants
What role do nutrients play in ecosystems?
Nutrients are essential for the growth and survival of organisms and are cycled through ecosystems.
True or False: Energy can be recycled within an ecosystem.
False
What is a niche?
A niche is the role or function of an organism or species within an ecosystem.
Fill in the blank: The __________ cycle describes the movement of water through the environment.
water
What is the primary source of energy for most ecosystems?
The primary source of energy for most ecosystems is sunlight.
