Worksheets7ALP - Exploring Life and Ecosystems
Total questions: 15
Worksheet time: 8mins
What is the primary purpose of classification tools like dichotomous keys?
To increase the number of species
To order and organise human understanding of the diversity of life
To eliminate extinct species
To create new species
Which of the following is a model used to represent the flow of energy through an ecosystem?
Dichotomous key
Food web
Cell theory
Periodic table
What is the basic unit of life according to cell theory?
Atom
Molecule
Cell
Organ
Which of the following is NOT a specialised structure or organelle found in cells?
Chloroplast
Ribosome
Mitochondria
Heart
How might a population be affected by the introduction of a new species into its ecosystem?
It will always increase
It will always decrease
It may increase, decrease, or remain stable depending on the interactions
It will remain unchanged
Which of the following is a biotic factor that can affect populations in an ecosystem?
Temperature
Soil pH
Predation
Water availability
What is the role of mitochondria in a cell?
Photosynthesis
Protein synthesis
Energy production
DNA replication
Which of the following is a characteristic of multicellular organisms?
They consist of a single cell
They have specialised cells for different functions
They do not have organelles
They are always microscopic
What is the function of chloroplasts in plant cells?
Respiration
Photosynthesis
Digestion
Protein synthesis
Which of the following is an abiotic factor that can influence an ecosystem?
Competition
Disease
Climate
Predation
What is the main component of the cell membrane?
DNA
Lipids
Proteins
Carbohydrates
Which of the following best describes a food pyramid?
A tool for classifying organisms
A model showing the number of organisms at each trophic level
A diagram of a cell
A representation of the water cycle
What is the primary function of ribosomes in a cell?
Energy production
Photosynthesis
Protein synthesis
DNA storage
Which of the following is a consequence of habitat loss on populations?
Increased biodiversity
Decreased competition
Population decline
Population stability
What is the role of the nucleus in a cell?
Energy production
Photosynthesis
Storing genetic information
Protein synthesis
