121. Flat footed camels can walk easily in sandy deserts because –

1. Pressure on the sand is decreased by increasing the area of the surface in contact
2. Pressure on the sand is increased by increasing the area of the surface in contact
3. Pressure on the sand is decreased by decreasing the area of the surface in contact
4. Pressure on the sand is increased by decreasing the area of the surface in contact

Option “1” is correct.
Flat footed camels can walk easily in sandy deserts because presuure on the sand is decreased by increasing the area of the surface in contact.
122. Mitochondria was discovered by –

1. Weismann
2. Darwin
3. Lamarck
4. Richard Altamann

Option “4” is correct.
Richard Altamann discovered Mitochondria.
123. The chemical used for destroying fungi in water tanks is –

1. Copper Sulphate
2. Magnesium Sulphate
3. Zinc Sulphate
4. Nitric Acid

Option “1” is correct.
Copper Sulphate is a fungicide used to control bacterial and fungal diseases of fruit, vegetable, nut and field crops. It is chemical used for destroying fungi in water tanks.
124. Which one of the following diseases is caused due to presence of excess arsenic in water?

1. Alzheimer’s disease
2. Parkinson’s disease
3. Skin cancer
4. Indigestion

Option “3” is correct.
Skin cancer is caused due to presence of excess arsenic in water.
125. Animals living in the tree trunks are known as –

1. Arboreal
2. Volant
3. Amphibious
4. Aquatics

Option “1” is correct.
Arboreal is defined as something having the evolutionary characteristics of animals which allow them to live or maneuver through trees. An example of an arboreal part of the chimpanzee’s anatomy is its long arms.
126. Which one of the following organs converts glycogen into glucose and purifies the blood?

1. Liver
2. Kidney
3. Lungs
4. Spleen

Option “1” is correct.
Liver converts glycogen into glucose and purifies the blood.
127. Lichen is an association between which of the two?

1. Algae and fungus
2. Algae and tree
3. Fungus and tree
4. Bacteria and legume plant

Option “1” is correct.
Lichens are symbiotic associations between algae and fungi.
128. What is a Pepper plant?

1. Bush
2. Shrub
3. Vine
4. Tree

Option “3” is correct.
Pepper is a flowering vine in the family Piperaceae, cultivated for its fruit which is usually dried and used as a spice and seasoning, known as a peppercorn.
129. Morphology of Chromosomes can be best studied at ______

1. Interphase
2. Prophase
3. Metaphase
4. Zygotene

Option “3” is correct.
Morphology of Chromosomes can be best studied at Metaphase.
130. Which of these process involves burning of food?

1. Digestion
2. Breathing
3. Respiration
4. Excretion

Option “3” is correct.
Respiration
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