Which of the following is most advanced in the evolutionary trend of animals?
پاسخ دهید
(D)
Cockroach
2
Which of the following is the lowest category of classification?
پاسخ دهید
(B)
species
3
Plants that show secondary growth are usually found among the
پاسخ دهید
(D)
dicotyledons
4
The fungi are distinct group of eukaryote mainly because they have
پاسخ دهید
(B)
no chlorophyll
5
An arthropod that is destructive at early stage of its life cycle is
پاسخ دهید
(A)
butterfly
6
An animal body that can be cut along its axis in any plane to give two identical parts is said to be
پاسخ دهید
(A)
radially symmetrical
7
Which of the following possesses mammary gland?
پاسخ دهید
(B)
whale
8
The feature that links birds to reptiles in evolution is the possession of
پاسخ دهید
(D)
scales
9
Countershading is an adaptive feature that enables animals to
پاسخ دهید
(B)
remain undetected
10
Which of the following plant structures lacks a waterproof cuticle?
پاسخ دهید
(C)
root
11
In the mammalian male reproductive system, the part that serves as a passage for both urine and semen is the
پاسخ دهید
(A)
urethra
12
In plants which of the following is required in minute quantities for growth?
پاسخ دهید
(A)
Copper
13
Which of the following organisms is both parasitic and autotrophic?
پاسخ دهید
(B)
Loranthus
14
A function of the hydrochloric acid produced in the human stomach during digestion is to
پاسخ دهید
(C)
stop the action of ptyalin
15
Which of the following is a polysaccharide?
پاسخ دهید
(D)
Cellulose
16
In the kidney of mammals, the site of ultrafiltration is the
پاسخ دهید
(B)
Bowman's capsule
17
Which of the following is involved in secondary thickening in plants?
پاسخ دهید
(D)
Vascular cambium and cork cambium
18
An example of a fruit that develops from a single carpel is
پاسخ دهید
(C)
bean
19
Plant growth can be artificially stimulated by the addition of
پاسخ دهید
(A)
gibberellin
20
The autonomic nervous system consists of neurons that control the
پاسخ دهید
(B)
heart beat
21
The water cycle is maintained mainly by
پاسخ دهید
(B)
evaporation and condensation of water in the environment
22
Plants of temperate origin can be grown in tropical areas in the vegetation zones of the
پاسخ دهید
(B)
guinea savanna
23
Organisms living in an estuarine habitat are adapted to
پاسخ دهید
(C)
withstand wide fluctuations in salinity
24
The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the
پاسخ دهید
(B)
mangrove swamps
25
Which of the following animals can exist solely on the water they get from food and metabolic reactions?
پاسخ دهید
(B)
Desert dwellers
26
The most likely first colonizers of a bare rock are
پاسخ دهید
(C)
lichen
27
The carrying capacity of a habitat is reached when the population growth begins to
پاسخ دهید
(D)
remain steady
28
The abiotic factors that control human population include
پاسخ دهید
(C)
flooding and earthquake
29
An indigenous method of renewing and maintaining soil fertility is by
پاسخ دهید
(D)
crop rotation and shifting cultivation
30
The diseases caused by water-borne pathogens include
پاسخ دهید
(D)
typhoid and cholera
31
Which of the following is true in blood transfusion?
پاسخ دهید
(A)
person of blood group AB can donate blood only to another person of blood group AB
32
A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be
پاسخ دهید
(D)
a dominant trait
33
When a colour-blind man marries a carrier woman. What is the probability of their offspring being colour blind?
پاسخ دهید
(B)
50%
34
The correct base pairing for DNA is
پاسخ دهید
(A)
adenine → thymine and guanine → cytosine
35
The short thick beak in birds is an adaptation for
پاسخ دهید
(A)
crushing seeds
36
The basking of Agama lizards in the sun is to
پاسخ دهید
(B)
raise their body temperature to become active
37
The significance of a very large number of termites involved in nuptial swarming is to
پاسخ دهید
(C)
search for a favourable place to breed
38
The use and disuse of body parts and the inheritance of acquired traits were used to explain
پاسخ دهید
(B)
Lamarck's theory
39
From his study of Galapagos finches, Darwin derived his theory of evolution from
پاسخ دهید
(B)
comparative physiology
40
Use the diagram above to answer this question.
The organelle responsible for heredity is labelled
پاسخ دهید
(B)
ll
41
Use the diagram above to answer this question.
The part labelled IV is the
پاسخ دهید
(C)
endoplasmic reticulum
42
Use the diagram above to answer this question.Arrows represent directional movement materials.
Transportation in the xylem is represented by
پاسخ دهید
(D)
IV
43
Use the diagram above to answer this question. Arrows represent directional movement materials.
The arrow labelled ll represents the
پاسخ دهید
(A)
release of oxygen
44
Use the diagram above to answer this question.
The developing embryo is usually contained in the part labelled
