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In humans, the excretory system consists of one pair of kidneys, a pair of ureters, a urinary bladder and a urethra. Each kidney has over a millio
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This practice test includes 25 questions from chapter excretory system class 11.
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Plants unlike animals have no special systems for breathing or gaseous exchange. Stomata and lenticels allow gaseous exchange by diffusion. Almo
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This practice test includes 25 questions from chapter Respiration In Plants Class 11.
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Green plants make their own food by photosynthesis. During this process carbon dioxide from the atmosphere is taken in by leaves through stomata a
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Anatomically, a plant is made of different kinds of tissues. The plant tissues are broadly classified into meristematic (apical, lateral and int
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This practice test includes 25 from the chapter human reproduction class 12.
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