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Question-1
Elements such as calcium, potassium, and phosphorus, needed by the plant in fairly large amounts are called:
(A)
Fertilizers
(B)
Coenzymes
(C)
Macronutrients
(D)
Enzyme activators
Question-2
The climate of a given region is:
(A)
Average temperature and precipitation conditions
(B)
Its weather
(C)
Average temperature and precipitation conditions for every day of the year in a given region
(D)
Its weather patterns
Question-3
Which of the following chemicals enters living organisms primarily from the atmosphere rather than from rocks or soil?
(A)
Calcium
(B)
Sulfur
(C)
Sodium
(D)
Carbon
Question-4
A biomass pyramid is important because it illustrates:
(A)
The biomass of all organisms at each trophic level in a system
(B)
How energy flows through a food web
(C)
The number of species in each trophic level
(D)
The number of trophic levels in a system
Question-5
The accumulation of herbivore biomass in an ecosystem is an example of:
(A)
Biogeochemical cycles
(B)
Transpiration
(C)
Net primary productivity
(D)
Secondary productivity
Question-6
Which of the following does not contribute to the species diversity of the tropics?
(A)
Predictability
(B)
Predation
(C)
Species homogeneity
(D)
High productivity
Question-7
What type of chemical energy is stored in a plant?
(A)
Kinetic
(B)
Nuclear
(C)
Solar
(D)
Potential
Question-8
Keystone species:
(A)
Are only found in aquatic habitats
(B)
Are always found at the top of the food chain
(C)
Are usually not the most abundant species in the ecosystem
(D)
Are vital to the soil balance of an entire ecosystem
Question-9
Which is a more accurate way of dating rocks?
(A)
Absolute dating
(B)
Relative dating
(C)
They are equally accurate
(D)
Both are inaccurate
Question-10
Which role is not performed by bacteria in the nitrogen cycle?
(A)
Fixing nitrogen
(B)
Changing urea to ammonia
(C)
Turning nitrates into nitrogen gas
(D)
Changing nitrates to ammonia
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Cambridge Secondary Grade 9
IGCSE
Practice in Related Chapters
The Interdependence of Living Organisms
Feeding
Keeping Healthy
Transport in Plants
Classification
Cells and Tissues
Movement in and out of Cells
Personal Health
Animal Nutrition
Reproduction
Sensitivity
Cells the Building Blocks
Genetics
The Skeleton, Muscles and Movement
A Sexual Reproduction and Cloning Plants
The Senses
Survival
Co-ordination
Energy for Respiration
The Chemicals of Living Cells
How Substances Get In and Out of Cells
Plants for Food
Photosynthesis and Nutrition in Plants
Plant Structure and Function
Food and Diet
The Human Impact on the Environment
Digestion, Absorption and Use of Food
The Blood Circulatory System
Breathing
Excretion and the Kidneys
Human Reproduction
Classification
Conservation
Micro Organisms
Reproduction in Flowering Plants
Movement and Locomotion
Growth and Development
Disease: causes, transmission and control
Ecosystems
Population
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