VERIFIED WAEC GCE 2015/16 BIOLOGY ANSWERS (ESSAY & OBJ)

                      Biology obj
1DBBBCDBBAB
11 CCBDBBBCCD
21 DCDCC – CCC-
31 BACABCCCAB
41 BBAACAB – CC

1a )
Blood – tissue,
guinea pig – organism ,
hebiscus flower- organ.
Human skeleton – system .
Plasmodium – cell .

1b )
Homeostasis can be defined as a property
of an organism or
system that helps it maintain its
parameters within a normal range
of values . It is key to life , and failures in
homeostasis can lead to
diseases like hypertension and diabetes .

1c )
When d body fluids become acidic ie d
concentration of acids
becomes higher than that of d bases d
kidney excretes more acid .

– When d concentration of d base is
higher the kidney will excrete
more salt with urine.

1d )
– Inflamation of d nephron caused by
bacteria . It causes glomeruli
to filter d blood completely leading to
useful substances like
protein to pass out with d urine excreted
by d kidney
.
– Secondly wen amino acids and calcium
phosphate settle in d
kidney they form kidney stone which
obstructs the free flow of
urine

2a )
Photosynthesis can be represented using a
chemical equation .
The overall balanced equation is . . .
6CO 2 + 6 H 2 O – – – – – – > C 6 H 12 O
6 + 6O 2
Sunlight energy
Where: CO 2 = carbon dioxide
H 2 O = water
Light energy is required
C 6 H 12 O 6 = glucose
O 2 = oxygen

2b ) Diagram of Dicotyledon leaf and
fully labeled

2c )
i)To produce substances that break down
fats ,
convert glucose to glycogen ,

ii) produce urea ( the main substance of
urine ), make certain amino
acids (the building blocks of proteins ) ,
filter harmful substances
from the blood (such as alcohol ),

iii )Storage of vitamins and minerals
( vitamins A , D , K and B 12 )
and maintain a proper level or glucose in
the blood .

Iv )The liver is also responsible fore
producing cholesterol.

v ) It produces about 80 % of the
cholesterol in your body
.
6ai )
(i) By Mechanism

(ii ) By species

6aii )
(i) Food

(ii ) Water

(iii ) Territory

(iv ) IDK

(6 C )
(i) Fluid Feeder :
are organisms that feed on the fluid of
other organisms. It can
refer to Hematophagy , feeding on blood ,
which include bedbug ,
butterflies , hood mockingbird , oxpeckers
and anopheles stephensi
mosquito Nectarivore, feeding on nectar
include bats visit open
flowers where the nectar is not deeply
hidden, hawkmoths and
hummingbird Plant sap feeders

(ii )Filter Feeder : are a sub group of
suspension feeding animals
that feed by straining suspended matter
and food particles from
water, typically by passing the water
over a specialized filtering
structure . Some animals that use this
method of feeding are
clams , krill , sponges , baleen , whales,
and fish (including sharks )

6D.
(i) to move the position of th hairs

(ii ) adjust the angle of hair shafts to
change the degree of
cornfield layer idk

(iii )
(i) maintaing the epidermal permeability
barrier , structure and
differentiation

(ii ) skin specific hormonal signalling
oo == GOODLUCK == oo