Neco Gce 2016/17 Biology Oby/Theory

Biology OBJ And ESSAY Neco Gce 2016 Free Expo Answers
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TUE 15th November 2016
BIOLOGY(obj and essay)2:00pm-4::30pm
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BIOLOGY OBJ:
1-10: AADEB6AEABC
11-20: AEACBCBDAA
21-30: DBCCAACBBC
31-40: AACEAECADB
41-50: ECACCEEADA
51-60: BDBBBDBCAB
(1ai)
Bone joint is a point where two bones meet
(1aii)
Dislocation is the process whereby a joint is being put out of ot
its position
(1aiii)
Haemorrhage is when blood escapes from the ruptured blood
vessel especially when profused
(1bi)
Arboreal animals are animals that live on trees with strong tails
-They posses strong arms
-They posses claws for good grip
-They posses sticky feets
-They posses small light bodies
(1bii)
-Tapeworm posses segement for absorbing via diffusion
-They possses hooks for absorption
-Their bodies are capable of absorbing digested foods
-They can survive by producing alot of eggs
2a)
-the mamalian blood helps to transport oxygen
to all cells in the body
-it also transports harmone from where it is
secreted to the target organs
-it helps in distributing heat uniformly to all
flight disease causing organisms eg white
blood cells
-it transports digested food in soluble form to
all parts of the body
-it helps to fight disease causing organisms
eg white blood cell
(2b)
(i)controlling body temperature
(ii)supplying oxygen and nutrients
(iii)removing waste
(iv)assisting the immune system
(v)transport hormones
2aii
1)In Male gamete: sperm is motile while IN FEMALE GAMETE
sperm is not motile
2)IN MALE GAMETE ;head is present while in FEMALE
GAMETE head is not present
3)IN MALE GAMETE tail is present while in FEMALE GAMETE
tail is not present
2bi)
Pollination is the transfer of pollen grains from matured anther
to stigma of the same or different flower.It can be self or
cross pollination.
2bii)
Fertilization is the process by which male and female gamete
fuse together to form zygote which develop into embryo.
2bii)
Implantation is process by which an embryo is attached to the
lining of the uterus
2ci)
Grasshopper
I)It constitute nuisance to sight
ii)it damages book
Mosquito
I)it is a vector of malaria parasite
ii)The female added transmit the virus causing yellow fever
ii)The female anlex mosquito transmit round worm which
causes elephantiasis
Termite
I)It destroy wood
ii)It serve as food in some places e.g Africa
(4ai)
Conservation of natural resources refers to the sustainable
utilization of natural resources, like soils, water, plants,
animals, and minerals, timber, fish, game, topsoil, pastureland,
and minerals, and also to the preservation of forests-forestry,
wildlife-wildlife refuge, parkland, wilderness, and watershed
areas.
(4aii)
Coagulation (also known as clotting ) is the process by which
blood changes from a liquid to a gel, forming a blood clot . It
potentially results in hemostasis , the cessation of blood loss
from a damaged vessel, followed by repair. The mechanism of
coagulation involves activation, adhesion, and aggregation of
platelets along with deposition and maturation of fibrin.
(4b)
Malaria-
Causative - Plasmodium
Symptom - fever
Control - cover drains
Typhoid -
Causative - salmonella typhi
Symptom - continued fever
Control - personal cleanliness
Tuberculosis-
Causative - mycobacterium
Symptom- fever
Control - Isolation of TB patients
Common cold-
Causative - Rhinovirus

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