1. A
   retina
2. B
   cornea
3. C
   pupil
4. D
   iris

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1. A
   Lysosome
2. B
   Vacuole
3. C
   Golgi body
4. D
   Endoplasmic reticulum

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1. A
   Crop rotation
2. B
   Mixed cropping
3. C
   Intercropping
4. D
   Mixed farming

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1. A
   Viruses are 'non-living' entities but it can interact with antibiotics
2. B
   Taking antibiotics cures viral infections
3. C
   Viruses do not possess metabolic pathways on which antibiotics can function, whereas bacteria have such pathways
4. D
   Viruses are resistant to antibiotics

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1. A
   Biomass is a renewable source of energy
2. B
   Gobar gas is produced when cow-dung, crop residues, vegetable waste and sewage are allowed to decompose in the absence of oxygen
3. C
   Biogas generation reduces soil and water pollution
4. D
   Heating capacity of biogas is very low

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1. A
   Nucleic acid
2. B
   Nucleoid
3. C
   Nucleolus
4. D
   Nucleosome

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1. A
   Epidermis
2. B
   Parenchyma
3. C
   Collenchyma
4. D
   Sclerenchyma

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1. A
   larynx
2. B
   nose
3. C
   ear
4. D
   urinary bladder

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1. A
   pupil
2. B
   cornea
3. C
   retina
4. D
   iris

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1. A
   Cervix
2. B
   Urethra
3. C
   Seminal vesicle
4. D
   Vas deferens

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1. A
   Large scale deforestation
2. B
   Exploitation of forest produce
3. C
   Maintaining sacred groves
4. D
   Encroachment in forest areas

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1. A
   Afforestation
2. B
   Loss of forests
3. C
   Excessive pumping of groundwater
4. D
   Construction of large scale concrete buildings

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1. A
   Carbon dioxide
2. B
   Methane
3. C
   Hydrogen
4. D
   Hydrogen sulphide

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1. A
   cellulose
2. B
   chitin
3. C
   cholesterol
4. D
   glycogen

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1. A
   Histomonas
2. B
   Trypanosoma
3. C
   Angomonae
4. D
   Naegleria

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1. A
   FDA
2. B
   WHO
3. C
   FSSAI
4. D
   FAO

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1. A
   Monocytes
2. B
   Platelets
3. C
   Eosinophils
4. D
   Neutrophils

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1. A
   Renin
2. B
   Nitrogenase
3. C
   Hydrolase
4. D
   Mono-oxygenase

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1. A
   no nucleus, no mitochondria and no endoplasmic reticulum
2. B
   nucleus, mitochondria and endoplasmic reticulum
3. C
   nucleus, mitochondria but no endoplasmic reticulum
4. D
   no mitochondria but endoplasmic reticulum is present

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1. A
   Rods
2. B
   Cones
3. C
   Blind spot
4. D
   Fovea

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1. A
   All proteins are enzymes
2. B
   Mostly enzymes are proteins
3. C
   All fats are energy rich compounds
4. D
   Glucose is a common carbohydrate

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1. A
   Starch
2. B
   Glucose
3. C
   Fructose
4. D
   Sucrose

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1. A
   Flower
2. B
   Inflorescence
3. C
   Fruit
4. D
   Seed

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1. A
   Fibrin
2. B
   Collagen
3. C
   Elastin
4. D
   Cellulose

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1. A
   $\textit{Ascaris lumbricoides}$
2. B
   $\textit{Culex pipiens}$
3. C
   $\textit{Wuchereria bancrofti}$
4. D
   $\textit{Fasciola hepatica}$

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