Question Library
Browse, filter, and study verified past examination questions with step-by-step mathematical reasoning.
Searching 18,000+ Questions...
Sifting topics, KaTeX formulas & verified solutions
Showing 19531–19545 of 29821 verified questions
Sort by:
Biology
WAEC / WASSCE 2000
Reproduction in Plants & Animals
Which of the following is not a dry indehiscent fruit?
A
Legume
B
Cypsela
C
Samara
D
Caryopsis
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #19650)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Which of the following groups consists of only micro-nutrients?
A
Molybdenum, sulphur and copper
B
Boron, Zinc and Calcium
C
Manganese, molybdenum and zinc
D
Magnesium, phosphorus and manganese.
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
Micronutrients (also known as trace elements) are essential nutrients required by plants and organisms in very small quantities. The standard list of plant micronutrients includes Boron (B), Zinc (Zn), Manganese (Mn), Iron (Fe), Copper (Cu), Molybdenum (Mo), and Chlorine (Cl).
Source: Myschool Past Questions Archive (Record #19651)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
The first stable product of photosynthesis is
A
starch
B
glucose
C
oxygen
D
water
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The first stable product of photosynthesis is actually Glucose, C\(_6\)H\(_{12}\)O\(_6\), which is a type of sugar but glucose is the more specific and accurate answer.
Source: Myschool Past Questions Archive (Record #19652)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following statements about nitrogen is not correct? Nitrogen is needed for
A
protein synthesis
B
activating certain enzymes
C
the synthesis of chlorophyll
D
healthy vegetative growth of plants
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #19653)
Biology
WAEC / WASSCE 2000
Variety of Organisms & Classification of Living Things
A very poor growth in plants and discolouration of leaves signifies the deficiency of
A
calcium
B
magnesium
C
potassium
D
manganese
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #19654)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Vitamin C which is water soluble is
A
cabalamine
B
pyridoxine
C
ascorbic acid
D
riboflavine
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #19655)
Biology
WAEC / WASSCE 2000
Respiration & Gaseous Exchange
Solution
When a mammal respires anaerobically for a long time
A
pyruvic acid is convened into acetyl COA
B
more energy is released from fats in the body
C
lactic acid accumulates in the muscles
D
the Krebs cycle is fully completed.
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
When a mammal respires anaerobically for a long time, lactic acid builds up in the muscles, leading to fatigue and cramps.
Lactic acid build-up: Anaerobic respiration produces lactic acid as a waste product when glucose is broken down. This lactic acid accumulates in the muscles.
Muscle fatigue: A buildup of lactic acid causes muscle fatigue.
pH drop: If too much lactic acid builds up, the pH falls, which can affect enzyme function and lead to fatigue and cramps. The correct answer is option C
Source: Myschool Past Questions Archive (Record #19636)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Solution
Which of the labelled structures in the diagram are involved with the entry
of carbondioxide for photosynthesis?
Attached Figure / Diagram
A
I, II and III only
B
I, II, III and VI
C
I, II, V and VI
D
I, II, III, and IV
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
During photosynthesis, carbon dioxide diffuses through the stomata into the mesophyll layer of the leaf, where the majority of photosynthesis takes place. At the same time, oxygen produced during photosynthesis diffuses out of the leaf through the stomata. This movement of gases in opposite directions is called gas exchange.
Guard cells control the size of the stomata to prevent the leaf from losing too much water in hot, dry, or windy conditions. In many plants, stomata are open during the day and closed at night.
The labelled structures where C02 will enter for photosynthesis to take place are I, II, III and VI
(See the attached diagram above)
Source: Myschool Past Questions Archive (Record #19637)
Biology
WAEC / WASSCE 2000
Cell & Its Environment (Diffusion, Osmosis & Transport)
Diagram
Solution
Which of the labelled structures in the diagram will shrink when plasmolysis
occurs?
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
Plasmolysis is a process that occurs when a plant cell loses water and shrinks due to being in a hypertonic solution, which is a solution with a high concentration of solutes like salt. The cell membrane detaches from the cell wall, and the protoplasm shrinks away.
The cytoplasm and plasma membrane of a plant cell shrink during plasmolysis, not the stomata. Option A
Source: Myschool Past Questions Archive (Record #19638)
Biology
WAEC / WASSCE 2000
Variety of Organisms & Classification of Living Things
Diagram
The condition shown in the above diagram is due to
Attached Figure / Diagram
A
conversion of starch to sugar
B
conversion of sugar to starch
C
excess water in structure labelled I
D
presence of carbondioxide in the structure labelled I
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #19639)
Biology
WAEC / WASSCE 2000
Cell & Its Environment (Diffusion, Osmosis & Transport)
Diagram
Which of the following solutions will induce the condition shown in the diagram?
Attached Figure / Diagram
A
Hypertonic solution
B
Hypotonic solution
C
isotonic solution
D
Distilled water.
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #19640)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Vitamin C deficiency results in
A
ricket
B
beri-beri
C
scurvy
D
pellagra
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #19656)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Members of the vitamin B complex are
A
water-soluble
B
fat-soluble
C
water insoluble
D
generally insoluble
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #19657)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following statements about phosphorous is not correct?
A
Helps to regulate the acid-base balance of the body
B
Regulates the metabolism of proteins, fats and carbohydrates
C
Required in many chemical reactions occurring in the body
D
Phosphorous is a major constituent of bones and teeth
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #19658)
Biology
WAEC / WASSCE 2000
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
Vitamin E is concerned with
A
bone formation
B
reproduction
C
normal growth
D
formation of red blood cells.
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
Vitamin E plays a vital role in the formation of red blood cells (erythropoiesis) and helps widen blood vessels to prevent blood from clotting within them. It is an essential fat-soluble antioxidant that protects the cell membranes of red blood cells from oxidative damage and lipid peroxidation, ensuring their stability and proper function. A deficiency in Vitamin E can lead to a condition known as hemolytic anemia, where red blood cells break down prematurely.
Source: Myschool Past Questions Archive (Record #19659)