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#Post#: 29--------------------------------------------------
2016/2017 WAEC VERIFIED BIOLOGY ANSWERS
DIR By: anephy
Date: April 18, 2016, 11:39 pm
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ON THE DAY OF MATHEMATICS THERE WOULD BE FREE ANSWERS
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( 1 a i
i- free living
ii - As filament
iii - As colony
=======
1ai)
i- free living
ii - As filament
iii - As colony
1aii)
i- Amoeba
ii - spirogyre
iii -volvox
1b.) Diagram
1c i)
Plant cells
* has chloroplast
* has a large vacoule
*has a cell centrioles
* has definities shape
Animal cell
* has no cloroplast
* has a small vacoule
*has centrioles
* has no definite shape
(2a)
Mouth,Oesophagus,Stomach,Duodenum,Small
intestine,Caecum,Appendix,Large
intestine,Rectum,Anus
(2bi)
TABULATE
Alimentary canal of birds|Alimentary canal of man
-There is presence of crop|Crop absent
-There is presence of proventiculus|Proventiculus
absent
-There is presence of gizzard|Gizzard is absent
(2bii)
-Both have caecum
-Both have Oesophagus
-Both have duodenum
(2c)
Herbivore posses heterodant type of dentition in
which they posses teeth of different shapes and
sizes.Herbivores feed mainly on vegetable hence
its teeth is 28 in numbers.Its incisors are flat with
sharp cutting edges for cutting vegetables or
grasses .canine is absent.the space creates due to
absense of the canine is called diastema.
Diastema allows manipulation of grasses in the
mouth.It has a very large molar and premolar
closely packed and have very large ridged surface
area for cutting and grinding
2d)
-They help in regulation of blood sugar by producing
insuling and glucagon
-They help in digestion
3ai)
A habitat is an ecological or environmental area that
is inhabited by a particular species of animal, plant,
or other type of organism.
The term typically refers to the zone in which the
organism lives and where it can find food, shelter,
protection and mates for reproduction, utilizing the
qualities the species has adapted to survive within
the ecology of the habitat. It is the natural
environment in which an organism lives, or the
physical environment that surrounds a species
population.
A habitat is made up of physical factors such as
soil, moisture, range of temperature, and availability
of light as well as biotic factors such as the
availability of food and the presence of predators.
A habitat is not necessarily a geographic area—for
a parasitic organism it is the body of its host, part of
the host's body such as the digestive tract, or a cell
within the host's body.
=========OR===========
(3ai)
A habitat comprises of an organism immediate
environment or where it lives or resides
(3aii)
-They help in the decay of the organisms
-They also help to return certain substances like
gases eg Nitrogen to the atmosphere thereby
regulating certain biological processes such as the
Nitrogen cycle,carbon cycle
-Some of the substances released are important in
processes such as respiration,photosynthesis
(3b)
Energy flows basically from the producers in a
fresh water habitat to the consumers.The
producers usually are phytoplanktons which are
taken up by the primary consumers usually small
fishes.
The primary consumer are taken up by the
secondary consumers which are larger fishes such
as sharks.This sharks may inturn be taken up by
man which is the tertiary consumer
SCHEMATIC DIAGRAM
Phytoplanktons->Small fishes->Sharks->Man
(3c)
-They causes diseases such as rice smut,black
pod of cocoa which may lead to waste
-They also reduce the economic value of plants
leading to financial loss
(3cii)
-They help in fermentation of certain substances
like yughourt eg lactobacillus species
-They help in decomposition and decay of
substances eg sprophytic micro organism
-They causes diseases eg smallpox and chicken
pox hence have been useful tools in the
development of antibiotics and vaccines
-They are useful in certain biological processes eg
photosynthesis
-They are used in sewage treatment
-Sources of enzymes
(6d)
-High temperature affect evaporation and reduces
performance
-High temperature may lead to seed dormancy
-It leads to loss of soil nutrients through
evaporation
-It affects the ripening and maturity of plant
-it is necessary for germination of seeds
(6ei) Courtship behaviour refers to the instructive
behaviour on response to certain external stimuli in
animals.It is the pattern of behaviour that preceeds
mating and reproduction in animals.It is performed
by male and female organism
(6eii)
-pairing
-Teritoriality
-Display
(6f)
-Holozoic nutrition
-Amoeba
-Entamoeba histolytica
-Humans
(6g) Crime detection using finger print method: this
applies to forensic. In this method,individuals
having different finger print pattern can be identified
using database of stored information of such
individuals.These method correctly identifies such
individuals aptly and is useful in crime detection
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