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Tuesday 25th June
Paper II: Objective & Essay - Biology 10.00 am -
12.30 pm
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NECO BIOLOGY
OBJECTIVE AND ESSAY

1-10: ADBBEDABEB
11-20: ABECBCEBAA
21-30: BBCEBBAABD
31-40: ABAADADEAC
41-50: CBCEACBBAB
51-60: EDCDCCAEDE


4(a)i 1 it results to continous
dehydration
2 it causes exhaustion
3 it may lead to blurred vision 4 it also leads to loss of
weight
ii 1 remoaval of meta ic waste
product from the
body
2 maintaining the balance
between water and salts in the
body
(b)i 1 erosion . 2. heavy rainfall
ii 1 international red cross
society
2 united nations childrens education fund
(UNICEF)
3 world Health orgnization
(WHO)
4 Nigerian medical association
(NMA) (C)i 1 sunlight 2.salinity 3.wind
4.temperature
ii 1it leadsto cellular differention
2 their surface area to volume
ratio is small
iii 1 olumu forest reserve in kwara
2 yankari game reserve in
bauchi state
3 Borgu game reserve in Niger
state
3(a)i Diffusion is the rapid movement of
molecules of
substances gas,or liuid from a
higher
concentration to a
lower concentration .it occurs in living orgnism
ii 1 gamates are formed/no
gamates are formed
2 involves fusion of male and
female gametes/no
fusion occur
3 zygote is formed/no zygotes
if formed
4 usually involves two
individuals/only one
organism involved
(b)i external respiration is the
exchange of gases
between
the environment and
respiratory organs of organism.
ii 1 it provides food for both
plants and animals
2 it release oxygen to the
environment
3 it serves as a building blocks for substances
4 it involves in the purification
of the atmosphere
(c) i 1.dodder 2.mushroom
3.venus sun trap
ii 1 possession of pairs of limb 2 possession of feather
3 possession of wings
4 possession of pentadacty



3(a)i Diffusion is the rapid
movement of
molecules of substances gas,or liuid from a
higher
concentration to a
lower concentration .it occurs in
living orgnism
ii 1 gamates are formed/no gamates are formed
2 involves fusion of male and
female gametes/no
fusion occur
3 zygote is formed/no zygotes
if formed 4 usually involves two
individuals/only one
organism involved




(1a) Draw and label yourself

(1bi) eyelid and cornea

(1bii)
- it brings about shortage of
blood
- it brings about disease
epidemy
-it brings about discomfort

(1ci)
- Pappus
-Tridax
-Mustard seed
(1cii)
Efferent nerve cell
Afferent nerve cell

4ai)
-excessive urine
-weakness of the body
-irregular heartbeat

4aii)
-it excretes nitrogenous waste
-it regulate water level
4bi)
-poor housing plan
-poor drainage system

4bii)
-DFID
-RED CROSS
-WORLD HEALTH ORGANIZATION
-ENVIRONMENT AGENCY

4ci)
-temperature
-high salinity
-hydrogen ion concentration
-high pressure

4cii)
-diffussion of labour gives room
for
efficient exploitation ofthe
environment
-specialization of various cell

4ciii)
-yankari game reserve
-olomu game reserve
-borgu game reserve



(2ai)Ecosystem is a unit which
involves the relationship
between plants and animals and
their relationship between them
and their environment

(2aii)
- Fire disaster brings about
distruction of soil fertility
- Its brings about death of useful
soil organisms like earthworm
-it exposes the soil todirect solar
radiations
-it enhances problem of soil
erosion

(2bi)
-Evaporation
-Condensation
-Precipitation

(2bii) Tabulate
Endocrine system: it involves
hormones in action
Nervous system: it nvolves
electrical reflexes
Endocrine system: it isslow
action
Nervous system: it is fast action
Endocrine system: it issecreted
by special organ
Nervous system: it is not
secreted but exerted
Endocrine system: transmit effect
through blood
Nervous system: transmit effects
through nerves

(2c)
Micro orgnism is an orgnism or
living component which cannot
be seen through the naked eyes
but through microscope

(2cii)
- Blood aids in transmission of
digested food substances to
where they are needed
-White blood cells (lymphocytes)
help in fighting against
infections
-Red blood cells (erythrocytes)
help in transport of oxygen
during respiration
- Blood helps in transportation of
waste products to their
excretory organs.







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