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Question-1
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-2
The study of how organisms interact with each other and their environment.
(A)
Biology
(B)
Ecology
(C)
Environmental science
(D)
Etiology
Question-3
The first trophic level refers to:
(A)
all animals
(B)
all herbivores
(C)
sunlight.
(D)
all green plants
Question-4
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-5
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-6
What type of organism carries out nitrogen fixation?
(A)
Bacteria
(B)
Fungi
(C)
Protists
(D)
All of the above
Question-7
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-8
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-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
The process of converting nitrate to nitrogen gas and nitrous oxide is called:
(A)
Nitrogen fixation
(B)
Ammonification
(C)
Denitrification
(D)
Eutrophication
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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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