cameroon gce O level June 2023 biology 1

cameroon gce O level June 2023 biology 1

cameroon gce O level June 2023 biology 1

Refraction of light rays in the eye follows this
order:
25.
Cornea, lens, aqueous humour, vitreous
humour.
Cornea, vitreous humour, lens, aqueous
humour.
Lens, aqueous humour, Cornea, vitreous
humour.
Cornea, aqueous humour, lens, vitreous

SECTION IV
Questions 26-30
(Five Questions)
Directions: Each of the following questions
consists of a statement in the left-hand
column followed by a second statement in
the right-hand column. Choose your
answer A, B, C or D as explained on the
table below.
D
20. Which structure in the mammalian skin is
sensitive to pressure?
A Pacinian corpuscles.
B Meissner’s corpuscles.
C Hair plexus.
D Nerve fibre. First
statement
Second
statementSECTION III
Questions 21-25
(Five questions)
Directions: For each of the questions
below, ONE or MORE of the response(s) is
(are) correct. Decide which of the
response(s) is (are) correct. Then choose:
2nd statement
is a correct
A True True
explanation
of the first.
2nd statement
is NOT a
correct
explanation of
the first.
B True True
If 1 , 2 and 3 are all correctA
If 1 and 2 only are correct
If 2 and 3 only are correct
B FalseC True
C False TrueD
D If 1 only is correct
First statement Second statement
21. A solution with the same water potential as its
surrounding can be described as:
1 Isotonic.
2 Hypertonic and hypotonic.
3 Hypotonic and isotonic.
The end products of
aerobic respiration are
more toxic.
Glucose is
completely
broken down
26
during aerobic
respiration.
The anopheles
mosquito
transmits
Anopheles mosquito
feeds on the blood of its
host causing malaria.
27
In which form(s) do plants obtain nitrogen
from the soil?
1 Nitrates.
2 Nitrites.
3 Ammonium compounds.
22.
Plasmodium.
A food web is made up
of several food chains.
28 In a food web,
each organism
has more than
one food source.
An insect pollinated flower has:
1 . Feathery stigma.
2 Brightly coloured petals.
3 Sticky pollen grains.
23.
Green plants combine
carbon dioxide and
water using solar energy
to produce organic food.
During
photosynthesis,
light energy is
converted to
‘ chemical
29
What makes the alveolus a good respiratory
surface?
1 It is highly permeable.
2 It is highly vascularized.
3 It has a thick epithelium.
24.
energy. Cellulose provides
roughage and prevents
constipation in human
diet.