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Model specimen showing symbiotic association in root nodules of leguminous plants, Cuscuta on host and Lichens

Leave a Comment / Class XII /

AIM– Model specimen showing symbiotic association in root nodules of leguminous plants, Cuscuta on host and Lichens Requirements– Root nodules of Touch-me-not plant/Pea/Gram, Twig of plant on which Dodder (Cuscuta) and Lichens Principle-The leguminous plants have symbiotic association of Rhizobium bacteria in their root nodules for nitrogen fixation from atmosphere. Dodder or Amarbel or Cuscuta […]

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Common disease causing organisms like Ascaries, Entamoeba, Plasmodium, Any fungus causing ring worm through permanent slides, models, virtual images or specimens. Comment on symptoms of diseases that they cause.

Leave a Comment / Science Question Bank /

Common disease causing organisms like Ascaries, Entamoeba, Plasmodium, Any fungus causing ring worm through permanent slides, models, virtual images or specimens. Comment on symptoms of diseases that they cause.

Common disease causing organisms like Ascaries, Entamoeba, Plasmodium, Any fungus causing ring worm through permanent slides, models, virtual images or specimens. Comment on symptoms of diseases that they cause. Read More »

Aim-Controlled pollination-emasculation, bagging and tagging

Leave a Comment / Science Question Bank /

Materials Required-Plants with large bisexual flowers, Tweezers, Scissors, Brush, Alcohol, Rubber bands / threads, Polythene bags, Tags, Magnifying Glass etc. Principle-Controlled pollination is a step of artificial hybridization. Emasculation is followed by a controlled pollination. The process of removal of stamens from bisexual flowers in order to prevent self-fertilization is called emasculation. Emasculation is carried

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Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Class 12 Biology

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Aim-Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Principle– The Mendelian concept of dominance and segregation can also be studied in humans by preparing and then analyzing the pedigree charts. The

Preparation and analysis of Pedigree Charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness in a selected special family. Class 12 Biology Read More »

Oxidation and Reduction

CHEMICAL REACTIONS AND EQUATIONS class 10 chapter 1

Leave a Comment / Class X /

Chemical Reaction, Reactants, Products, Notations or symbols of physical states of reactants and products, Types of chemical reactions, Combination Reaction, Decomposition Reaction, Displacement Reaction, Decomposition Reaction,  Reactivity series of metals,  Double Displacement Reaction, Exothermic reactions, Endothermic reactions, Balanced chemical equations, Precipitation reaction, Oxidation Reaction, Reduction Reaction, Oxidising and reducing agents, Effects of oxidation reactions in daily life, Redox reactions, Corrosion, Rusting, Rancidity

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HUMAN HEART

Leave a Comment / PISA QUESTIONS CLASS VI-VIII /

The blood circulatory system consists of heart and blood vessels. Heart is a vital organ located in chest cavity. It beats continuously to act as pump for transport of blood. It has four chambers. There are two upper auricles and two lower ventricles make four chambers in the human heart. The rhythmic contraction and expansion of heart is called heart beat. The human heart beats about 70-80 times per minute in an adult person. This is called heart rate. The four chambered heart separates the oxygenated blood from deoxygenated blood. The main artery is aorta. The pulmonary artery carries deoxygenated blood from heart to lungs. The pulmonary vein carries oxygenated blood from lungs to heart.

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