Which of the following structures is common to Euglena, white blood cell and Amoeba?
คำตอบ
(D)
Cell membrane
3
The term 'Thyllophyta'refers to
คำตอบ
(B)
algae and fungi
4
The following organisms are hermaphrodites EXCEPT?
คำตอบ
(C)
Schistosoma
5
Parasitic form are NOT found among
คำตอบ
(C)
mollusces
6
Which of the following sets of organisms represents the correct trends from simple to complex structural organization? 1. Mollusca 2. Platyhelminthes 3. Nematoda 4. Protozoa
คำตอบ
(D)
4 → 2 → 3 → 1
7
Spirogyra, Euglena and Chlamydomonas share many characteristics EXCEPT
คำตอบ
(C)
mobility
8
The prothallus of fern is equivalent to the gametophyte generation of moss because it
คำตอบ
(C)
bears sexual organ
9
What is the function of Trichocyst in paramecium?
คำตอบ
(B)
Defence
10
The long and coiled intestine of a young tadpole ia an adaptation to its
คำตอบ
(A)
herbivorious diet
11
Lungs hooks are used for respiration in
คำตอบ
(A)
spiders
12
Insects and millipede have many features in common EXCEPT
คำตอบ
(C)
compound eyes
13
The major function of the swim-bladder in fishes is
คำตอบ
(B)
buoyancy
14
Which of the following statements gives the BEST description of bark?
คำตอบ
(B)
Cork-like tissue found only in stems
15
In the transverse section of the leaf of maize vascular bundles are arranged in
คำตอบ
(B)
one circle
16
If an animal has diastema, it would NOT posses
คำตอบ
(B)
cannines
17
If the gall bladder of a mammal is damaged, which of the following will be most seriously affected?
คำตอบ
(C)
Digestion of fats and oil
18
Which of the following will be first digested if ingested at the same time?
คำตอบ
(B)
Cooked rice
19
If the phloem of a healthy plant is killed by heat treatment the
คำตอบ
(B)
food manufactured in the leaves will accumulate
20
In the mammalian respiratory system, exchange of gases occurs in the
คำตอบ
(D)
alveoli
21
The main waste products formed in plants are
คำตอบ
(D)
water, carbondioxide and oxygen
22
In the kidney, the malpighian corpuscles is located in the
คำตอบ
(C)
cortex
23
The skin, through the sweat glands, function as
คำตอบ
(A)
an excretory organ
24
Parenchyma cells are serves as supporting tissue when they
คำตอบ
(D)
become turgid
25
Taxism differs from tropism because
คำตอบ
(A)
the whole organism is affected
26
A dry dehiscent fruit which breaks up into one-seeded part is a
คำตอบ
(A)
schizocarp
27
Airspace are characteristic of seeds of fruits dispersed by
คำตอบ
(B)
water
28
In vegetation propagation, which of the following requires part of another plant to develop?
คำตอบ
(A)
Scion
29
Which of these plants groups are normally propagated by asexual means?
คำตอบ
(A)
Banana, yam, pineapple and cassava
30
In a mammal, the placenta performs functions similar to those to the
คำตอบ
(A)
lungs kidneys and digestive system
31
The radicle of a bean seedling grows most rapidly in the region
คำตอบ
(D)
just below the root tip
32
The main function of the choroid is
คำตอบ
(C)
supply of nutrient to tissue of the eye
33
What part of the central nervous system is concerned with answering an examination question
คำตอบ
(A)
Cerebrum
34
If a dark-skinned woman (Bb) marries an albino man (bb) and they have four children, how many of the children will be dark-skinned?
คำตอบ
(B)
2
35
A red-coloured flower when crossed with a white-coloured one produced pink flowers. This is an example of?
คำตอบ
(B)
blending inheritance
36
The turbidity of a pond can be measured using the
คำตอบ
(B)
secchi disc
37
The most important substance necessary for the maintenance of life are carbon , oxygen
คำตอบ
(D)
nitrogen, salt and water
38
IF an organism obtains its food by means of haustoria, it is said to be
คำตอบ
(D)
parasitic
39
Which of the following relationship involves only one organism?
คำตอบ
(A)
Saprophytism
40
Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats?
คำตอบ
(B)
Salinity
41
Which of these groups of animals is likely to be found in fresh water?
คำตอบ
(B)
Blood worm, pond skater and dragonfly larva
42
One of the characteristics of plants in the savanna is the
คำตอบ
(D)
possession of thick, flaky bark
43
Which of the following diseases can be contracted in areas with fast flowing rivers?
คำตอบ
(D)
Onchoceriasis
44
Which of the following causes pollution?
คำตอบ
(D)
Burning of refuse
45
The mineral nutrient that is most bound to the soil is
