The organs that will be most useful to giant African rats in finding their way in underground habitats are the
回答
(A)
vibrissae
2
The increasing order of the particle size in following soil type is
回答
(C)
clay → silt → sand → gravel
3
The causative agent of bird flu is a
回答
(B)
virus
4
Which of the following is an example of parasitism?
回答
(C)
mistletoe growing on an orange tree
5
One adaptation shown by hydrophytes in freshwater habitats is the
回答
(B)
poor development of roots and xylem tissues
6
A crucible of 5g weighed 10g after filling with fresh soil. it is then heated in an oven at 100°C for 1 hour. After cooling in a desiccator, the weight was 8g.The percentage of water in the soil is
回答
(D)
40%
7
The highest level of ecological organization is the
回答
(C)
biosphere
8
The mangrove swamp in Nigeria is restricted to the
回答
(D)
tropical rain forest
9
A biotic factor which affects the distribution and abundance of organisms in a terrestrial habitat is
回答
(B)
competition
10
In which of the following Nigeria states can mountain vegetation be found?
回答
(A)
Taraba
11
Which of the following factors can bring about competition in population?
回答
(C)
drought
12
The theory which supports the view that the large muscles developed by an athlete will be passed on to the offspring was proposed by
回答
(A)
Lamarck
13
In lizards, the lowering of the gular fold is used to?
回答
(B)
attract mates
14
Example of a fish that aestivates is
回答
(C)
lung fish
15
In mammals, the organ directly on top of the kidney is the
回答
(B)
adrenal grand
16
The photosynthetic pigments include
回答
(A)
chlorophyll and carotenoids
17
Monocot stem differ from dicot stems in that monocot have
回答
(A)
no cambium
18
The opening and closing of the stoma are regulated by
回答
(D)
osmosis
19
Stunted growth and poor root development are a result of a deficiency in
回答
(B)
phosphorus
20
The pancreas secretes enzymes for the digestion of
回答
(A)
fats, proteins and carbohydrates
21
Pineapple is an example of
回答
(C)
a composite fruit
22
The correct sequence of the movement of urea during urine formation is
The waste product of plants used in the conversion of hide to leather is
回答
(C)
tannin
24
Which of the following uses diffusion as the principal method of gaseous exchange?
回答
(D)
earthworm
25
Which of the following has the most primitive respiratory system?
回答
(A)
snail
26
A water medium is necessary for fertilization in
回答
(C)
ferns
27
The chromosomes of members of the kingdom Monera are within the
回答
(B)
cytoplasm
28
The process of shedding the exoskeleton of an arthropod is known as
回答
(C)
ecdysis
29
Which of the following is common to the mosquito, housefly and blackfly?
回答
(A)
they undergo complete metamorphosis
30
An accurate identification of a rapist can be carried out by conducting a
回答
(B)
DNA analysis
31
which of the following is true of cloning?
回答
(D)
it involves the asexual multiplication of the tissues of the original organism
32
An example of a sex linked trait is the
回答
(D)
possession of facial hair in adult humans
33
Use the diagram above to answer this question. The type of protective adaptation exhibited by the animal is
回答
(C)
countershading colouration
34
Use the diagram above to answer this question. The structure labelled l is
回答
(D)
tactile
35
Use the diagram above to answer this question.Insulin is produced by the endocrine organ labelled
回答
(B)
III
36
Use the diagram above to answer this question. The function of the structure labelled l is to
回答
(D)
regulate the activities of other endocrine glands
37
Use the diagram above to answer this question.Oxygenated blood is pumped to the entire body from the part labelled
回答
(A)
IV
38
Use the diagram above to answer this question. The part labelled l is the
回答
(C)
aorta
39
Use the diagram above to answer this question.The part labelled lV is responsible for
回答
(A)
osmoregulation
40
Use the diagram above to answer this question. The organelle responsible for sexual reproduction is
回答
(D)
lll
41
Use the diagram above to answer this question.
The process illustrated is
回答
(D)
sexual reproduction in Rhizopus
42
Use the diagram above to answer this question.
The structure labelled l is the
回答
(C)
zygospore
43
Use the diagram above to answer this question.
If the dogs are offspring of a monohybird cross and the gene G for grey head is dominant cross over its allele g, the individual whose genotype is likely to be gg is
回答
(C)
IV
44
Use the diagram above to answer this question.
Which of the following will be true of dog ll which lost its tail in an accident if it mates with dog lll.
