Q. Deforestation has an alarming effect on
1) Increase in gazing area
2) Sunlight
3) Weed control
4) Soil erosion
Q. Enzyme ptyalin is produced by
1) Gastric Gland
2) Islets of Langerhans
3) Liver
4) Salivary Glands
Q. Enzymes are basically
1) Fats
2) Carbohydrates
3) Proteins
4) Vitamins
Q. Which one of the following is the smallest gland in the body?
1) Adrenal
2) Thyroid
3) Pancreas
4) Pituitary
Q. The number of amino acids, known so far, is
1) 12
2) 22
3) 32
4) 42
Q. Plants are killed in winter by frost
1) Because of desiccation and mechanical damage to the tissue
2) Because no photosynthesis takes place at such low temperature
3) Because respiration ceases at such low temperature
4) Because there is no transpiration
Q. When the right ventricle in the human heart contracts, the blood moves to -
1) Aorta
2) Brain
3) Lungs
4) Pulmonary arteries
Q. Who among the following is associated with the theory of inheritance of acquired characteristics?
1) Charles Darwin
2) Lamarck
3) Spencer
4) De Vries
Q. Antigene are a
1) Carbohydrates
2) Fat
3) Hormone
4) Protein
Q. Energy flow in an ecosystem is -
1) Cyclic
2) Multidirectional
3) Sequential
4) Unidirectional
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