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Biology
WAEC / WASSCE 2017
Variety of Organisms & Classification of Living Things
The establishment of game reserves and parks is a method of
A
conserving natural resources
B
cultivating game
C
controlling pollution
D
cultural awareness
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 #48588)
Biology
WAEC / WASSCE 2017
Population Ecology, Habitats & Conservation
Which of the following practices is not used in conserving water?
A
Afforestation
B
Damming
C
Deforestation
D
Reforestation
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 #48589)
Biology
WAEC / WASSCE 2017
Digestive System & Feeding Mechanisms
Which of the following resources cannot be renewed?
A
Air
B
Petroleum
C
Food crop
D
Soil
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 #48591)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
Diagram
Solution
The type of variation illustrated above is
Attached Figure / Diagram
A
continuous variation
B
discontinuous variation
C
morphological variation
D
environmental variation
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
The rolling of the tongue is an example of discontinuous variation. This type of variation describes traits that fall into distinct categories, with no intermediates. In the case of tongue rolling, individuals are either able to roll their tongue or they are not. There's no "partial rolling".
Source: Myschool Past Questions Archive (Record #48592)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
Which of the following characters is not a morphological variation?
A
shape of the nose
B
colour of skin
C
colour of hair
D
tongue rolling
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 #48593)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
An apple plant can produce sexually and asexually and it has 40 chromosomes in its leaf cells. How many chromosomes would be in each gamete and somatic cell?
A
20 chromosomes in the gametes and 10 in the somatic cells
B
40 chromosomes in the gametes and 20 in the somatic cells
C
20 chromosomes in the gametes and 40 in the somatic cells
D
40 chromosomes in the gametes and 40 in the somatic cells
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 #48595)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
Solution
Assuming that A is the gene for normal skin color and is dominant, while a is the gene for albinism and its recessive, what is the likely genotype of the couple which had 50% normal and 50% albino offspring?
A
AA, aa
B
Aa, aa
C
AA, Aa
D
Aa, Aa
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
Crossing Aa & aa would give 50% normal and 50% albino offspring
Source: Myschool Past Questions Archive (Record #48597)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
Which of the following statements is true about mutation?
A
Phenotype is not involved
B
Genotype is not involved
C
Artificial induction is not possible
D
Genotype is involved
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 #48598)
Biology
WAEC / WASSCE 2017
Supporting Tissues & Skeletal System
One of the structural adaptations of mammals for movement on land is the development of the
A
hollow bones
B
pentadactyl limb
C
fused thoracic bones
D
streamlined body
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 #48599)
Biology
WAEC / WASSCE 2017
Adaptation & Evolution
Which of the following is NOT characteristic of social insects?
A
All members are identical
B
There is division of labour
C
The members dwell in the same habitat
D
Some members protect the queen
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 #48601)
Biology
WAEC / WASSCE 2017
Adaptation & Evolution
The gradual cumulative, adaptive and heritable changes in an organism over a long period of time resulting in new species is called
A
adaptation
B
survival
C
organic evolution
D
interspecific competition
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 #48602)
Biology
WAEC / WASSCE 2017
Variety of Organisms & Classification of Living Things
Solution
(a) (i) What is classification of living things?
(ii) Name the scientist that developed the Binomial System of Classification
(iii) State three reasons why it is necessary to classify living things
(iv) List seven major groups into which taxonomists classify living things in order of hierarchy
(b) state two features each which viruses have in common with: (i) living things
(ii) non-living things
(c) Name two viral disease each of:
(i) plants
(ii) humans
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
Classification of Living things: Is the sorting/ grouping/arranging of living things (in groups); according to their common/similar characteristics/features/shared qualities.
(ii) The scientist who developed the Binomial system of classification: Carl/Carolus Linnaeus/Linnaeous
(iii) Reasons for classification of living things
To put every lying organism into a systematic order/ specific group
for easy identification of similar living things
to indicate/Show the relationships between different categories of living organisms
to show evolutionary trends in different groups of living organisms
to trace geographical distribution of living organisms
for easy reference
for easy research/study.
(iv) Classification of ranks in order of hierarchy
Kingdom
Phylum/Division
Class Order
Family
Genus
Species.
Features of Viruses as (i) living things (ii) nonliving things
(i) Living things
has protoplasm/protein coat/membrane
contain DNA/RNA/Nucleic acid
(ii) Non-living things
appear as crystals
lack of organelles
(c) Viral diseases of:
(i) Plants:
Cassava mosaic disease
Bean mosaic diseases
cacao swollen shoot disease
Groundnut rosette
maize streak
cucumber mosaic
any correctly named disease.
(ii) Humans;
poliomyelitis/polio
chicken pox
mumps
measles
influenza/flu
AIDS
Ebola disease
infective hepatitis
Lassa fever
Avian influenza (Bird flu)
Swine flu (Bovine flu)
Rabies
Zika
any correctly named disease.
Source: Myschool Past Questions Archive (Record #52650)
Biology
WAEC / WASSCE 2017
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Solution
(a) State four characteristics of enzymes
(b) (i) List two digestive enzymes produced in the duodenum of humans
(ii) Name the substrate that each enzyme listed in 2(b)(i) acts on.
(iii) State the products of each enzyme activity in 2(b)(ii)
(c) (i) State one way in which chlorophyll is important in plants
(ii) Name two macroelements that are required for the formation of chlorophyll in plants.
(iii) State one deficiency symptom of each macroelement named in 2 (c) (ii) above
(d) Outline the proce-dure used for testing for starch in a leaf
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a). Characteristic of Enzymes;
They are biological catalystsialter/speed up the rate of biological reactions
remain chemically unchanged at the end of a reaction
their actions are reversible
they are specific in action/act on specific substrates
enzymes are required in small amount
are protein in nature
they act best at optimum temperature/high temperature/denatures them/ low temperature inactivates them
specific/sensitive to pH
actions retarded by poisons/inhibitors
some required co-enzymes to function.
(b)i. Digestive enzymes produced in the duodenum of humans
Amylase
Trypsin/chymotrypsin
Lipase
ii. Substrates for each enzyme
Amylase = starch
Trypsin/chymotrypsin =protein
Lipase = fats and oil
iii. Product of enzyme activity
Amylase = maltose
Trypsin/chymotrypsin = peptones/polypeptides/peptide
Lipase =glycerol and fatty acid
(c)i. Importance of chlorophyll in plants
Absorbs/traps sunlight; for photosynthesis
ii. Macro-elements required for the formation of chlorophyll
Nitrogen
Magnesium
Iron
iii. Deficiency symptoms of each macro-element in (c)ii
Nitrogen
Chlorosis/yellowing of leaves
Stunted growth
Poor flower/fruit development
MagnesiuM
Poor growth
Chlorosis/yellowing of leaves
Iron
Poor/stunted growth
Chlorosis/yellowing of leaves
(d) Procedure for test for starch
Detach/pluck off/take leaf to be tested from plant after 4 to 6 hours of exposure to sun to enable it to form starch
Put leaf in boiling water for about 30 seconds to kill the cells
Put boiled leaf in 70% warm alcohol/ethylated spirit in water bath to decolorise the leaf Rinse decolorised/brittle leaf in running cold water to soften the leaf tissues/remove alcohol
Spread out on white tiles/watch glass and add a few drops of iodine solution
Allow to stand for a few minutes
It turns blue-balck showing/indicating presence of starch.
Source: Myschool Past Questions Archive (Record #52651)
Biology
WAEC / WASSCE 2017
Basic Ecological Concepts, Ecosystems & Biomes
Solution
(a) Name one instrument used for collecting:
(i) soil organism from a soil sample
(ii) tiny insects from a leaf or a stem.
(b) make a diagram 6 cm - 8 cm long of the instrument named in (a)(ii) above and label fully.
(c) Explain briefly the relationship between three examples of symbiotic organisms.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
(a)i. Instrument for collecting soil organisms from a soil sample
Sieve
Tullgren funnel
ii. Instrument for collecting tiny insects from a leaf or stem
Pooter
(b) Diagram/drawing of pooter
Quality (0)
Stopper/rubber bung with two openings (RO) x1
Two delivery tubes one longer than the other x1
Inner end of shorter delivery tube with mesh/gauze(IM) x1
(c) Symbiotic relationships in organisms
Trichonympha Protozoa living in the gut of a termite;
Helps the termite to digest cellulose; while the protozoa trichonympha gets protection and food in return from the termite.
Sea anemone attaching itself to the shell of hermit crab; thereby enjoying pieces of leftover food therein. The hermit crab in turn enjoys protection against predators/ the sea anemones stings prevent the predators from harming the hermit crab.
Algae and fungi in a lichen; Lichen is made up of a fungus and a unicellular alga living together. The green alga produces food/photosynthesis for the association; the fungus protects the alga/absorbs water from the surrounding.
Rhizobium sp Nitrogen- fixing bacteria and root modules of leguminous plants. The Rhizobium fixes atmospheric nitrogen directly into the plant while rhizobium enjoys shelter/food/nutrients from the plant.
Source: Myschool Past Questions Archive (Record #52654)
Biology
WAEC / WASSCE 2017
Variation & Genetics (Heredity)
Solution
(a) A child belongs to blood group 0 and the mother be-longs to group B. With the aid of genetic cross, state the possible blood groups of the father.
(b) (i) Name two forms of adaptive communication in animals
(ii) State two reasons why organisms communicate with one an-other.
medium Difficulty
Verified Correct Answer: Option
Biological Concept & Syllabus Guide
A child belongs to blood group 0 and the mother be-longs to group B. With the aid of a genetic cross. State the possible blood groups of the father
(a) Genetic cross
If the father is group A
(b)i. Forms of adaptive communication
Sound/auditory/acoustic
visual; smell/chemical/ pheromones
tactile
electrical signal
display.
ii. Reasons why organisms communicate with one another
for food
maiting/reproduction
territorial defence
danger/threats/predator
tracking routes.
Source: Myschool Past Questions Archive (Record #52657)