Which of these tissue serves the function of support and water conduction
คำตอบ
(D)
Xylem
4
Which of these is the terminal portion of the alimentary canal of a mammal?
คำตอบ
(C)
Rectum
5
An organism which lives on the remain of dead plant is
คำตอบ
(B)
Saprophyte
6
Which of the substance listed below is a trace element of plants?
คำตอบ
(C)
Copper
7
The movement of molecules from a region of higher concentration to one of lower concentration is
คำตอบ
(A)
Diffusion
8
Which of the structure listed below is peculiar to the axis vertebra?
คำตอบ
(A)
Odontoid process
9
The complex relationship between the members of a community and between the community as a whole and its physical environment is
คำตอบ
(A)
Ecosystem
10
A secchi disc is used in the determination of
คำตอบ
(D)
Turbidity
11
The carrier of the hereditary character in plants and animal is the
คำตอบ
(C)
Chromosome
12
Which one of the following option is not true for mucor of Rhizophus? it
คำตอบ
(C)
Has cellulose cell-wall
13
Which of these is not an enzyme?
คำตอบ
(B)
Gastrin
14
The region of cell division in a root is
คำตอบ
(E)
Meristem
15
Which of these statement below is not a characteristic of wind pollinated flower?
คำตอบ
(C)
The pollen grains have rough spiny surfaces
16
Which of the following is not an excretory organ in animals?
คำตอบ
(C)
Leaf
17
When the ciliary muscles of the eye contract, the eye lens
คำตอบ
(E)
Is rounded
18
Which of these diseases cannot be controlled by killing the vector?
คำตอบ
(C)
Polio
19
In which of these association is much harm done to one of the partners?
คำตอบ
(D)
Parasitism
20
The part of the mammalian brain responsible for maintaining balance is
คำตอบ
(B)
Cerebellum
21
Which of the following statements is not true of paramecium?
คำตอบ
(E)
Its vacuole is stationary
22
A sugar solution was boiled with fehling’s solution A and B and the colour remained blue. The sugar tested was
คำตอบ
(D)
Sucrose
23
Alkaline pyrogallol was used in an experiment. That experiment must have been connected with
คำตอบ
(E)
Photosynthesis
24
The plumule is best described as?
คำตอบ
(C)
A miniature shoot
25
The dry indehiscent, winged fruit formed from one one carpel is known as
คำตอบ
(C)
Samara
26
Which of these is not a type of soil?
คำตอบ
(B)
Granite
27
The farmer cannot check soil erosion effectively by
คำตอบ
(D)
Clearing the land of vegetation
28
A gland in the human body secretes two hormones, one of which causes a disease called diabetes when there is a deficiency. Which of these organ produce the hormone?
คำตอบ
(E)
Pancreas
29
In which of the following tissue do the cells have the ability to divide?
คำตอบ
(A)
Meristem
30
Which one of the following is not an excretory product?
คำตอบ
(C)
Faeces
31
Bacteria inhabiting legume root nodules and which add atmospheric nitrogen to the soil are referred to as
คำตอบ
(C)
Nitrogen fixing bacteria
32
One of the following statement is not true of viruses
คำตอบ
(C)
They can be seen with an ordinary light microscope
33
If you cross breed a tall variety (Tt) of maize with a short variety (tt), the ratio of tall to short plants in the offspring will be
คำตอบ
(C)
1:1
34
The digestive enzyme that coagulates proteins in milk is
คำตอบ
(C)
Renin
35
The hepatic portal vein is characterized by
คำตอบ
(A)
Beginning and ending with capillaries
36
The blood vessel which carries digested food from the small intestine to the liver is the
คำตอบ
(D)
Hepatic portal vein
37
The maize grain is regarded as a fruit and not a seed because
คำตอบ
(B)
The testa and fruit wall fuse after fertilization
38
Identical twins are produced under one of the following conditions
คำตอบ
(B)
one ovum ferilized divides to give two embryos
39
The one-seeded fuit in which the pericarp and the seed coat have become fused together is known as
คำตอบ
(C)
caryopsis
40
The major function of contractile vacuole in amoeba is?
คำตอบ
(E)
to collect and expel water in the cytoplasm
41
Grasses → grasshopper→ lizard → snakes → hawks. In the food chain, the organism which are the least in number are
คำตอบ
(E)
hawks
42
Grasses → Grasshoppers → Lizards → Snakes → Hawks
Which of these is not true? Grass in the above food chain
คำตอบ
(A)
trap all the sunlight
43
Insect show consideration powers of water conservation. This is due to the fact that
