| 1. Offsprings | (a) Pollination by insects |
| 2. Anemophily | (b) Pollination by animals |
| 3. Spermatogenesis | (c) Blood vessels |
| 4. Umbilical cord | (d) Expulsion of the young one |
| 5. Entomophily | (e) Seminiferous tubules |
| 6. Parturition | (f) Sexual reproduction |
| 7. Zoophily | (g) Pollination by wind |
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| i. $H _2 O$ | (a) 16 |
| ii. $CO _2$ | (b) 18 |
| iii. $C _6 H _{12} O _6$ | (c) 44 |
| iv. $CH _4$ | (d) 180 |
| 1. Alcohol | (a) >C = O |
| 2. Aldehyde | (b) -COOH |
| 3. Ketone | (c) -CHO |
| 4. Carboxylic acid | (d) -HO |
| 1. $C _n H _{2 n +2}$ | (a) Alkene |
| 2. $C _{ n } H _{2 n }$ | (b) Alcohol |
| 3. $C _{ n } H _{2 n -2}$ | (c) Alkane |
| 4. ROH | (d) Alkyne |
| 1. Uranium core bomb | (a) fusion bomb |
| 2. Plutonium core bomb | (b) fission bomb |
| 3. Hydrogen bomb | (c) Nagasaki |
| 4. Atom bomb | (d) Hiroshima |
| Metal | Ore | Chemical formula |
| 1. Copper | Bauxite | $ZnCO _3$ |
| 2. Aluminium | Haematite | $CuFeS _2$ |
| 3. Iron | Copper pyrite | $Fe _2 O _3$ |
| 4. Zinc | Calamine | $Al _2 O _3 \cdot 2 H _2 O$ |
| 1. ρ=RAl | (a) watt |
| 2. σ=1ρ | (b) Ωm |
| 3. E = P × t | (c) coulomb |
| 4. P = VI | (d) $m ^{-1} \Omega^{-1}$ |
| 5. q = It | (e) Kilowatt-hour |
| 1. $CH _3- CH _2 OH$ | (a) Ethanal |
| 2. $CH _3- COOH$ | (a) Ethanal |
| 3. $CH _3- CHO$ | (c) Propanone |
 | (d) Ethanoic acid |
| i. Monoatomic molecule | (a) Ozone |
| ii. Diatomic molecule | (b) Phosphorous |
| iii. Triatomic molecule | (c) Helium |
| iv. Polyatomic molecule | (d) Oxygen |
| i. $F_2$ | (a) Polyatomic molecule |
| ii. $O _3$ | (b) Monoatomic molecule |
| iii. $P_4$ | (c) Diatomic molecule |
| iv. $He$ | (d) Triatomic molecule |