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Question-1
The macronutrient, _______________ , is important to the operation of stomata.
(A)
Magnesium
(B)
Manganese
(C)
Sulfur
(D)
Potassium
Question-2
The kind of place to which a species is biologically adapted to live is its:
(A)
Optimum
(B)
Niche
(C)
Habitat
(D)
Zone of stress
Question-3
The major biotic components of ecosystems include:
(A)
temperature, moisture, sunlight, and pH.
(B)
producers, herbivores, carnivores, and plants
(C)
plants, animals, climate, and microorganisms
(D)
producers, consumers, decomposers, and detritus feeders
Question-4
On an annual basis, approximately what percentage of all the CO
2
in the atmosphere is fixed by photosynthesis?
(A)
100%
(B)
0%
(C)
36%
(D)
10%
Question-5
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-6
In most species, as K+ moves in or out of the guard cell to regulate the stomatal opening, there is movement in the opposite direction by:
(A)
Na+
(B)
H+
(C)
OH-
(D)
Cl-
Question-7
What type of chemical energy is stored in a plant?
(A)
Kinetic
(B)
Nuclear
(C)
Solar
(D)
Potential
Question-8
Which of the following is a secondary consumer?
(A)
A carnivore
(B)
A herbivore
(C)
A plant
(D)
All of the above
Question-9
The first trophic level refers to:
(A)
all animals
(B)
all herbivores
(C)
sunlight
(D)
all green plants
Question-10
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
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Cambridge Secondary Grade 10
IGCSE
Practice in Related Chapters
Feeding
Cells and Tissues
Ecosystems
Population
Transport in Plants
The Chemicals of Living Cells
Sensitivity
Energy For Respiration
How Substances Get In and Out of Cells
Photosynthesis and Nutrition in Plants
Plant Structure and Function
Food and Diet
The Interdependence of Living Organisms
The Human Impact on the Environment
The Blood Circulatory System
Digestion, Absorption and Use of Food
Breathing
Excretion and the Kidneys
Human Reproduction
Reproduction
Classification
Conservation
Micro Organisms
Reproduction in Flowering Plants
Movement and Locomotion
Growth and Development
A Sexual Reproduction and Cloning Plants
The Skeleton, Muscles and Movement
The Senses
Co-ordination
Personal Health
Disease: cause, transmission and control
Genetics
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