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Biology
WAEC / WASSCE 2011
Variety of Organisms & Classification of Living Things
Some animals return to water bodies to reproduce because
A
natural enemies destroy their eggs on land
B
water nourishes their embryos and their young ones
C
they are close to their ancestors and imitate them
D
the temperature on land is not suitable for the development of their embryos
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #21703)
Biology
WAEC / WASSCE 2011
Reproduction in Plants & Animals
Which of the following methods is appropriate for the cultivation of cassava?
A
Budding
B
Fragmentation
C
Root cutting
D
Stem cutting
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #21704)
Biology
WAEC / WASSCE 2011
Variation & Genetics (Heredity)
What will be the chromosome number of the hybrid of two varieties of a plant with 36 chromosomes in the endosperm cell?
A
12
B
24
C
35
D
48
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 #21706)
Biology
WAEC / WASSCE 2011
Cell Structure, Organization & Cell Division
Kreb’s cycle occurs in the
A
mitochondria
B
cytoplasm
C
nucleus
D
ribosomes
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 #21708)
Biology
WAEC / WASSCE 2011
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
The process whereby electrons are emitted from chlorophyll and returned to it unchanged is known as?
A
non-cyclic phosphorylation
B
photochemical reaction
C
photophorylation
D
cyclic photophorylatlion
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
During cyclic photophosphorylation, the electrons are transferred back to P700 instead of moving into the NADP from the electron acceptor. This downward movement of electrons from an acceptor to P700 results in the formation of ATP molecules
Source: Myschool Past Questions Archive (Record #21709)
Biology
WAEC / WASSCE 2011
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Which of the following statements about photosynthesis is not true?
A
Plants can photosynthesize without an increase in dry weight
B
Carbon dioxide is absorbed by the leaves in bright light
C
oxygen is produced during photosynthesis from the breakdown of water
D
Photosynthesis occurs in green plants
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 #21710)
Biology
WAEC / WASSCE 2011
Variety of Organisms & Classification of Living Things
The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to
A
provide more energy to the roots
B
accumulate more starch in the roots
C
cause the underground roots to develop buds
D
cause the p ant to wither and die
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #21711)
Biology
WAEC / WASSCE 2011
Variety of Organisms & Classification of Living Things
Which of the following groups of substances are not six-carbon compounds?
A
Glucose and lactose
B
Lactose and cellulose
C
Glucose, Lactose and Pyruvate
D
Pyruvate and cellulose
medium Difficulty
Verified Correct Answer: Option D
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #21712)
Biology
WAEC / WASSCE 2011
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
The conversion of glucose to starch in the leaf during the day principally
A
enables photosynthesis
B
prevents osmotic problems
C
enables the leaf to store the starch
D
enables glucose to be used up
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 #21714)
Biology
WAEC / WASSCE 2011
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
A purple colour was obtained when sodium hydroxide solution and a drop of copper sulphate solution were added to a food substance. The food substance is likely to be a
A
carbohydrate
B
fat
C
protein
D
sugar
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 #21719)
Biology
WAEC / WASSCE 2011
Digestive System & Feeding Mechanisms
Which of the following enzymes is active in the duodenum?
A
Pepsin
B
Renin
C
Trypsin
D
Amylase
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 #21720)
Biology
WAEC / WASSCE 2011
Variety of Organisms & Classification of Living Things
The following organisms are producers except
A
Hibiscus
B
Mushroom
C
Cactus
D
Spirogyra
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 #21721)
Biology
WAEC / WASSCE 2011
Digestive System & Feeding Mechanisms
Which of the following structures produces the greatest variety of digestive enzymes?
A
Salivary glands
B
Pancreas
C
Stomach
D
Colon
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 #21723)
Biology
WAEC / WASSCE 2011
Basic Ecological Concepts, Ecosystems & Biomes
The following are abiotic components of an ecosystem except
A
temperature
B
oxygen
C
bacteria
D
soil
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 #21724)
Biology
WAEC / WASSCE 2011
Basic Ecological Concepts, Ecosystems & Biomes
Solution
Use the information on capture-recapture method to calculate the total number of organisms in a habitat.
First capture = 200
Second capture = 120
Number of organisms with mark in second capture = 40
The total number of organisms therefore is
A
200
B
360
C
600
D
800
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
The formula for estimated population is
\(\frac{No of marked in 1st capture}{No of species} = \frac{No of marked in 2nd capture}{no of species in 2nd capture}\)
= \(\frac{200 \times 120}{40} = 600\)
Source: Myschool Past Questions Archive (Record #21725)