A major difference between platyhelminthees and coelenterates is that platyhelminthes
回答
(B)
have developed a mesoderm
5
The essential structural difference between hydra and tapeworm is that while Hydra
回答
(B)
is diploblastic, tapeworm is triplobastic
6
The flowering period of plants in a habitat is determined by the
回答
(A)
duration of sunlight
7
The structure labelled X is used by the organism in the same way as man uses his?
回答
(A)
oesophagus
8
The structure labelled Y is the
回答
(C)
macronucleus
9
Which of the following insects undergoes incomplete metamorphosis?
回答
(B)
Termite
10
An onion is a bulb because it
回答
(B)
has a reduced stem and thick fleshy leaves
11
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
回答
(D)
guard cell
12
Fungi are heterotropic because they
回答
(D)
lack chlorophyll
13
The major site of photosynthesis in the leaf is the
回答
(A)
palisade parenchyma
14
5 cm3 dilute sodium hydroxide solution and 5 cm3 one percent copper sulphate solution are added to a solution of food specimen. The purple colour which is observed shows the presence of
回答
(D)
protein
15
The blood vessel which carries blood from the alimentary canal to the liver is the
回答
(C)
hepatic portal vein
16
Gaseous exchange in Aves occurs in the
回答
(C)
air sacs
17
In the absence of oxygen, the pyruvic acid produced during glycolysis is converted to CO2 and
回答
(C)
ethanol
18
The excretory organ in insects is the
回答
(B)
malpighian tubule
19
The structure labelled 5 is the
回答
(A)
sweat gland
20
Melanin and keratin are produced in the part labelled
回答
(A)
2
21
The bone of the neck on which the skull rests is known as the
回答
(C)
atlas
22
Which enzymes are contained in the pancreatic juice?
回答
(D)
Amylase, lipase and trypsin
23
The part labelled 3 is the
回答
(C)
synovial fluid
24
The function of the part labelled 1 is to
回答
(D)
hold the joint in place
25
Double fertilization in higher plants is significant because it ensures the
回答
(B)
formation of a fertile embryo and the endosperm
26
In mammalian development, the function of the yolk is to
回答
(A)
supply nutrients to the embryo
27
Hypogeal germination is characterized by the
回答
(D)
elongation of the epicotyl
28
Fruits which develop without fertilization of the ovule are
回答
(D)
parthenocarpic
29
Which part of the curve represents the fastest rate of growth?
回答
(C)
M
30
The grand period of growth is represented by
回答
(B)
M
31
Neurons that receive stimuli from the body or internal organs are called
回答
(A)
sensory neurons
32
Which of the following is true of climax community?
回答
(A)
it persists until the enviroment or climate changes
33
A population is defined as a collection of similar organism that
回答
(C)
are found in the same habitat
34
In typical predator food chain involving secondary and tertiary consumers, the organism become progressively
回答
(C)
larger and fewer along the food chain
35
Which level of the pyramid has the least total stored energy?
回答
(D)
H
36
Which organism in the pyramid functions as a tertiary consumer?
回答
(B)
Shark
37
Mangrove swamp can be found
回答
(B)
where a river meets the sea
38
Soil with the finest particles is called
回答
(B)
clay
39
Malaria symptoms are caused by
回答
(B)
the multiplication of the malaria sporozites in the liver
40
Which of the following is true of the children of a heamophilic man who marries a woman that is not haemophilic and does not carry the trait?
回答
(C)
All their daughters will be carriers
41
A child with blood group genotype different from those of both parents and with a mother of genotype OO, can only have a father of genotype
回答
(C)
AB
42
If R and r, denotes the genes for a character, the offspring of the cross between RR and Rr are
回答
(C)
2RR, 2Rr
43
A mammal with red fur and long ears was crossed with another having white fur and short ears. If the offspring had a red fur and short ears, the
回答
(A)
character are linked
44
Pawpaw seeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable character as the parent because
回答
(B)
uncontrolled out-crossing can introduced unwanted variability
