1. A
   Development of the basic and heavy industry sector
2. B
   Increase in national income to raise living standards
3. C
   Expansion of the consumer goods sector
4. D
   Expansion of employment opportunities

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1. A
   1
2. B
   2
3. C
   3
4. D
   None

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1. A
   1
2. B
   2
3. C
   3
4. D
   None

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1. A
   19% and 81%
2. B
   81% and 19%
3. C
   38% and 62%
4. D
   62% and 38%

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1. A
   Sand, lime, clay
2. B
   Silica, alumina, lime
3. C
   Silica, lime, graphite powder
4. D
   Sand, graphene, clay

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1. A
   Fungi
2. B
   Lichens
3. C
   Bacteria
4. D
   Termite

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1. A
   +2
2. B
   +4
3. C
   +3
4. D
   +5

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1. A
   A-4, B-2, C-3, D-1
2. B
   A-4, B-3, C-2, D-1
3. C
   A-1, B-3, C-2, D-4
4. D
   A-1, B-2, C-3, D-4

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 only
2. B
   2 and 3 only
3. C
   1 and 3 only
4. D
   1, 2 and 3

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1. A
   1 only
2. B
   1 and 2 only
3. C
   2 and 3 only
4. D
   1, 2 and 3

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1. A
   1 and 2
2. B
   2 and 3
3. C
   2 only
4. D
   3 only

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1. A
   1 only
2. B
   1 and 2 only
3. C
   2 and 3 only
4. D
   1, 2 and 3

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1. A
   1 only
2. B
   1 and 2 only
3. C
   2 and 3 only
4. D
   1, 2 and 3

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1. A
   1 only
2. B
   1 and 2 only
3. C
   2 and 3 only
4. D
   1, 2 and 3

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1. A
   Steppes
2. B
   Prairies
3. C
   Savanna
4. D
   Pampas

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1. A
   They are composed of phospholipids only.
2. B
   They are composed of proteins only.
3. C
   They are composed of phospholipids and proteins only.
4. D
   They are composed of phospholipids, proteins and cholesterol (lipid).

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1. A
   Mirror
2. B
   Stage
3. C
   Clip
4. D
   Retina

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1. A
   Protein – Organism – Tissue – Organ
2. B
   Protein – Organ – Tissue – Organism
3. C
   Protein – Organism – Organ – Tissue
4. D
   Protein – Tissue – Organ – Organism

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1. A
   1
2. B
   2
3. C
   3
4. D
   4

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1. A
   Secretion of surfactants to break up lipid droplets
2. B
   Storage and regulated release of bile
3. C
   Secretion of lipase, amylase and protease
4. D
   Neutralizing stomach acids

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1. A
   1 only
2. B
   1 and 2 only
3. C
   1, 2 and 3
4. D
   3 only

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1. A
   $N_1 = 1.6$ N and $N_2 = 0.8$ N
2. B
   $N_1 = 0.8$ N and $N_2 = 1.6$ N
3. C
   $N_1 = 0.6$ N and $N_2 = 1.8$ N
4. D
   $N_1 = 1.8$ N and $N_2 = 0.6$ N

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1. A
   11.2
2. B
   15.8
3. C
   5.6
4. D
   7.9

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1. A
   They transport energy
2. B
   They need a medium to travel
3. C
   They are transverse
4. D
   They travel faster in liquids than in gases

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