2.To show that light is necessary for photosynthesis a science teacher told Raman to cover a leaf with a thick black paper. The reason behind this can be a)To destarch the leaf b) to prevent the light from entering the leaf c)to decolourise the leaf d) to turn leaf blue black 3. It is essential to boil the destarched leaf in alcohol using a water bath because – Alcohol is highly volatile b)steam from the water bath helps in dissolving chlorophyll c) alcohol is inflammable d) steam from the water bath helps in softening the leaf 4.Stomata are more in number on the - Upper side of the leaf c)same on both the sides b) lower side of the leaf d) margins of the leaf 5. In the experiment to show that CO2 is released during respiration the partial vacuum is created because – a) Germinating seeds release CO2 b) germinating seeds utilize CO2 c) KOH absorbs CO2 d) KOH absorbs O2. 6.While preparing a 6.temporary stained mount of a leaf epidermal peel the extra stain is removed by - a)Washing with water b)Washing with calcium chloride c)Soaking with filter paper d)Absorbing by cotton cool Important Endocrine glands, the hormone they secrete & their function Refer to figure 7.7 page no. 124 of N.C.E.R.T text book No. GLAND HORMONES FUNCTION TARGET SITE 1. Hypothalamus Releaser hormones -Regulates secretion of pituitary Pituitary (RH) hormones. gland Inhibiting hormones 2. Pituitary Growth hormone -Controls growth- dwarfism & -Most tissues Gland (GH) gigantism. 4. Thyroid Gland Thyroxin -Basal metabolic rate, RBC formation. -Body tissues Triiodothyronine -Regulates Ca level. Thyrocalcitonin (TCT) 7. Adrenal Gland Adrenaline -Increase alertness, pupilary dilation, -Body tissues Noradrenalin piloerection, sweating, and heart beat. Corticoids
2.To show that light is necessary for photosynthesis a science teacher told Raman to cover a leaf with a thick black paper. The reason behind this can be a)To destarch the leaf b) to prevent the light from entering the leaf c)to decolourise the leaf d) to turn leaf blue black 3. It is essential to boil the destarched leaf in alcohol using a water bath because – Alcohol is highly volatile b)steam from the water bath helps in dissolving chlorophyll c) alcohol is inflammable d) steam from the water bath helps in softening the leaf 4.Stomata are more in number on the - Upper side of the leaf c)same on both the sides b) lower side of the leaf d) margins of the leaf 5. In the experiment to show that CO2 is released during respiration the partial vacuum is created because – a) Germinating seeds release CO2 b) germinating seeds utilize CO2 c) KOH absorbs CO2 d) KOH absorbs O2. 6.While preparing a 6.temporary stained mount of a leaf epidermal peel the extra stain is removed by - a)Washing with water b)Washing with calcium chloride c)Soaking with filter paper d)Absorbing by cotton cool Important Endocrine glands, the hormone they secrete & their function Refer to figure 7.7 page no. 124 of N.C.E.R.T text book No. GLAND HORMONES FUNCTION TARGET SITE 1. Hypothalamus Releaser hormones (RH) Inhibiting hormones -Regulates secretion of pituitary hormones. Pituitary gland 2. Pituitary Gland Growth hormone (GH) -Controls growth- dwarfism & gigantism. -Most tissues 4. Thyroid Gland Thyroxin Triiodothyronine Thyrocalcitonin (TCT) -Basal metabolic rate, RBC formation. -Regulates Ca level. -Body tissues 7. Adrenal Gland Adrenaline Noradrenalin Corticoids -Increase alertness, pupilary dilation, piloerection, sweating, and heart beat. -Body tissues
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