What is the level of organization of an onion bulb?
إجابة
(B)
organ
2
A characteristic exhibited by all living organism is?
إجابة
(D)
the ability to remove unwanted substances
3
In a cell, the genes are carried by?
إجابة
(B)
chromatin threads
4
Alternation of asexual and sexual modes of reproduction is found in?
إجابة
(C)
fern
5
The first terrestrial vertebrates evolved from
إجابة
(A)
pisces
6
In plants, the structures that play roles similar to the arteries and veins of animals are the
إجابة
(A)
xylem and phloem
7
A blue-green algae is not a protophyte because?
إجابة
(B)
its cells are prokaryotic
8
The feature that makes locomotion in water easy for fish is the?
إجابة
(C)
streamlined body
9
Bird toes suitable for digging have claws that are?
إجابة
(A)
blunt
10
Which of the following is an example of carnivorous plant?
إجابة
(B)
bladderwort
11
The part of alimentary system of a bird where food is ground into small particles is the?
إجابة
(D)
gizzard
12
which of the following describes the sequence of blood flow from the heart to a tissue?
إجابة
(A)
Heart→ artery→ arteriole →tissue?
13
The enzymes of the glycolytic pathway are located in the?
إجابة
(D)
cytoplasm
14
In insects, the structure that performs the same function as the kidney in man is the?
إجابة
(C)
malphigian tubule
15
The axial skeleton is found in the
إجابة
(A)
skull, ribs, vertebral column and breast bone
16
The reproductive system of a male mammal is made up of?
إجابة
(B)
testis, prostrate gland, sperm duct and penis
17
In a bean seed, absorption of water at the beginning of germination is through the?
إجابة
(B)
micropyle
18
The most important ecological factor in a terrestrial environment is?
إجابة
(D)
soil
19
The association between bacteria residing in the rumen of the ruminant is?
إجابة
(D)
mutualism
20
A marine protozoan is likely to have no contractile vacuole mainly because the cytoplasm is
إجابة
(A)
isotonic to sea water
21
In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is?
إجابة
(A)
nature of substratum
22
Which of the following biomass could be characterized by very low rainfall,cold nights, hot days, and fast blooming plants?
إجابة
(C)
tropical desert
23
Mass of crucible = 10g
Mass of crucible and soil before heating = 29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?
إجابة
(D)
60%
24
I. Onchocerciasis
II. Schistosomiasis
III.Salmonellosis
IV. Meningitis
which of the diseases listed above are associated with water?
إجابة
(C)
I, II and III
25
The major cause of global warming is the?
إجابة
(A)
burning of fossil fuel
26
The uniqueness of an individual organism in a population is accounted for by?
إجابة
(B)
variation
27
A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as?
إجابة
(B)
continuous variation
28
A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of
إجابة
(D)
heredity
29
The nephridia in the earthworm form part of the?
إجابة
(D)
excretory system
30
A woman with the ability to roll her tongue (Tt) marries a man who cannot roll his tongue(tt). what is the probability of each of their children being a tongue roller?
إجابة
(C)
50%
31
A health condition that is known to have resulted from gene mutation is?
إجابة
(C)
sickle-cell anaemia
32
Plants that grow in an area that is neither too wet nor too dry are
إجابة
(B)
mesophytes
33
The part of a domestic fowl responsible for preventing heat loss is the?
إجابة
(C)
down feather
34
Which of the following animals is most adapted for water conservation?
إجابة
(D)
insects
35
The specialized pigment cells that are involved in colouration and colour change in animals?
إجابة
(B)
chromatophores
36
During the dry season in the tropics, the body metabolism of some animals slow to a minimal level in a process referred to as?
إجابة
(B)
aestivation
37
According to Darwin, the driving force behind evolutionary change is
إجابة
(A)
natural selection
38
Use the diagram above to answer this question.
The structure that controls loss of water vapour during transpiration is labelled
إجابة
(D)
lV
39
Use the diagram above to answer this question.
The part labelled l is the
إجابة
(C)
cuticle
40
Use the diagram above to answer this question.
Emulsification of fats takes place in the part labelled?
إجابة
(D)
lV
41
Use the diagram above to answer this question.
The content of the part labelled lll is usually?
إجابة
(C)
acidic
42
Use the diagram above to answer this question.
The zone of physiological stress is represented by?
إجابة
(D)
l and lll
43
Use the diagram above to answer this question.
The optimum temperature for the growth of the organism is
