JAMB - Biology (1993)
1
On what structure are the units of inheritance situated?
2
Production of naked seeds is a distinctive feature of the group of plant called
3
In which of these features do bryophytes differ from pteridophytes?
Sagot(D)
Presence of vascular system
4
Which of the following organs or cells components are common to both the sporophytes and the gametophytes of a fern?
5
In which of the following organism does a single cells performs all the function of movement, nutrition, growth , excretion, photosynthesis?
6
In which of the following organisms would glycogen be stored?
7
The most successful group of animals in terms of diversity of species is
8
Sagot(D)
excretory system of flatworms
9
The spores of mucor are dispersed by
10
The butterfly is of great economic importance because
Sagot(D)
it polllinates flowers of crops and other plants
11
Manufactured food in the plant is transported through the
12
interveinal chlorosis is normally associated with the deficiency of
13
Osmic acid boiled with a solution of food substance gave a black precipitate. This indicates the presence of
14
Which of the labelled parts is the diastema?
15
This lower jaw is typical of a
16
The end products of the digestion of fats and oils in mammals are
17
The main function of blood in mammals is to transport
Sagot(A)
excretory materials from tissues
18
Members of the phylum protozoa use the contractile vacuole
19
The response shown by the tips of the root and shoot of a plant to the stimulus of gravity is
20
Which of the following is the correct order of the vertebrae along the spinal column?
Sagot(C)
Atlas → axis → cervical → thoracic → lumbar → sacral
21
Which of the following is TRUE of the process of conjugation in paramecium?
Sagot(D)
Each micronucleus divides twice
22
The bright colours of the comb and feathers in the peacock are for
23
The main function of the petal of a flower is to
Sagot(A)
attract pollination agents
24
In the mammal, the autonomic nervous system consists of
Sagot(A)
sympathetic and parasympathetic system
25
In H, the cotyledons are carried above the soil because
Sagot(B)
the hypocotyl grows faster than the epicotyl
26
The function of the structure labelled G is to
Sagot(A)
carry out initial photosynthesis for the seedlings
27
When it is cold, the blood vessels of the skin
Sagot(B)
constrict to reduced the amount of blood flowing to the skin
28
Which path does sound entering the human ear follow?
Sagot(C)
Ear drum → ossicles → oval window
29
What would happen to a man whose pancreas has been surgically removed?
Sagot(A)
The level of blood sugar would increase
30
Carnivorous plants are usually found in areas
Sagot(A)
which are deficient of nitrate
31
What is the term used to describe the sum total of biotic and abiotic factors in the environment of the organism?
32
Important abiotic factors which affects all plants and animals in the habitat are
33
The most important physical factor which affects an organism living in the intertidal zone of the seashore is
34
At which trophic level would the highest accumulation of a non-biodegradable substance occur?
35
Two organisms of different species, living in close association but not dependent on each other are referred to as
36
Which of the following instruments is NOT used in measuring abiotic factors in any habitat?
37
Plants adapted for life in salty marsh are called
38
Which group of plants would be the first colonizers in an ecological succession changing rocks to soil?
39
Soil fertility can be conserved and renewed by
Sagot(B)
crop rotation and cover crops
40
What ecological condition favours the breeding of black flies?
41
Carbon monoxide poisons tissue by
Sagot(C)
combining with haemoglobin
42
Which of the following is an example of discontinuous variation observed in man?
43
During blood transfusion, agglutination may occur when
Sagot(A)
contrasting antigens reacts with contrasting antibodies
44
In the illustration above, the genotypes of the offsprings are
Sagot(B)
1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
45
Cold blooded animals are referred to as
