Thursday, July 29, 2021

Frequently used root words in biology - 6 (Organisms)

FREQUENTLY USED ROOT WORDS RELATED TO ORGANISMS


Learning root words and their meaning help you to understand and remember biology terms very easily. Given below is the table showing frequently used root words related to Organisms. Try to memorize them and practice the problems below.

Frequently used root words in biology - 5 (Numbers, size, Measurements, and Instruments)

FREQUENTLY USED ROOT WORDS RELATED TO NUMBERS, SIZE, MEASUREMENT & INSTRUMENTS


Learning root words and their meaning help you to understand and remember biology terms very easily. Given below is the table showing frequently used root words related to Numbers, size, Measurements, and Instruments. Try to memorize them and practice the problems below.

Transport in Plants - NEET/ Entrance questions and answers PDF

NEET
Entrance questions with answers

Friday, June 25, 2021

Control and Coordination | Class 10 CBSE | PPT full

CONTROL AND COORDINATION: 

PPT PRESENTATION >>



Thursday, June 10, 2021

How do Organisms Reproduce? | Class 10 CBSE | PPT full

HOW DO ORGANISMS REPRODUCE?

PPT Presentation 

PART 1


Wednesday, June 9, 2021

Chemical Coordination and Integration | Focus Area Special PDF Notes 2021 | Plus One

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Neural Control and Coordination | Focus Area Special PDF Notes 2021 | Plus One

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Locomotion and Movement | Focus Area Special PDF Notes 2021 | Plus One

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Excretory Products and their Elimination | Focus Area Special PDF Notes 2021 | Plus One

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Body Fluids and Circulation | Focus Area Special PDF Notes 2021 | Plus One

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Breathing and Exchange of Gases | Focus Area Special PDF Notes 2021 | Plus One

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Digestion and Absorption | Focus Area Special PDF Notes 2021 | Plus One

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Plant Growth and Development | Focus Area Special PDF Notes 2021 | Plus One

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Respiration in Plants | Focus Area Special PDF Notes 2021 | Plus One

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Photosynthesis | Focus Area Special PDF Notes 2021 | Plus One

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Mineral Nutrition | Focus Area Special PDF Notes 2021 | Plus One

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Transport in Plants | Focus Area Special PDF Notes 2021 | Plus One

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Cell Cycle and Cell Division | Focus Area Special PDF Notes 2021 | Plus One

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Biomolecules | Focus Area Special PDF Notes 2021 | Plus One

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Cell the Unit of Life | Focus Area Special PDF Notes 2021 | Plus One

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Structural Organisation in Animals | Focus Area Special PDF Notes 2021 | Plus One

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Anatomy of Flowering Plants | Focus Area Special PDF Notes 2021 | Plus One

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Morphology of Flowering Plants | Focus Area Special PDF Notes 2021 | Plus One

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Animal Kingdom | Focus Area Special PDF Notes 2021 | Plus One

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Plant Kingdom | Focus Area Special PDF Notes 2021 | Plus One

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Biological Classification | Focus Area Special PDF Notes 2021 | Plus One

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The Living World | Focus Area Special PDF Notes 2021 | Plus One

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Plus One Biology Focus Area Special PDF Notes 2021

Plus One Biology (Botany + Zoology)

Focus Area Special PDF Notes 2021

Sunday, May 23, 2021

Life Processes | Class 10 CBSE | PPT full

LIFE PROCESSES: 

PPT PRESENTATION >>



Saturday, May 15, 2021

Exam Capsule PPT | Environmental Issues | Class 12

Exam Capsule PPT 
Environmental Issues - Download

Exam Capsule PPT | Biodiversity and Conservation | Class 12

Exam Capsule PPT 
Biodiversity and Conservation - Download

Exam Capsule PPT | Ecosystems | Class 12

Exam Capsule PPT 
Ecosystems - Download

Exam Capsule PPT | Organisms and Populations | Class 12

Exam Capsule PPT 
Organisms and Populations - Download

Exam Capsule PPT | Biotechnology and its Applications | Class 12

Exam Capsule PPT 
Biotechnology and its Applications - Download

Exam Capsule PPT | Microbes in Human Welfare | Class 12

Exam Capsule PPT 
Microbes in Human Welfare - Download

Exam Capsule PPT | Biotechnology: Principles and Processes | Class 12

Exam Capsule PPT 
Biotechnology: Principles and Processes - Download

Exam Capsule PPT | Strategies for Enhancement in Food Production | Class 12

Exam Capsule PPT 
Strategies for Enhancement in Food Production - Download

Exam Capsule PPT | Human Health and Diseases | Class 12

Exam Capsule PPT 
Human Health and Diseases - Download

Exam Capsule PPT | Evolution | Class 12

Exam Capsule PPT 
Evolution - Download

Exam Capsule PPT | Molecular Basis of Inheritance | Class 12

Exam Capsule PPT 
Molecular Basis of Inheritance - Download

Exam Capsule PPT | Principles of Inheritance and Variation | Class 12

Exam Capsule PPT 
Principles of Inheritance and Variation - Download

Exam Capsule PPT | Reproductive Health | Class 12

Exam Capsule PPT 
Reproductive Health - Download

Exam Capsule PPT | Human Reproduction | Class 12

Exam Capsule PPT 
Human Reproduction - Download

Exam Capsule PPT | Sexual Reproduction in Flowering Plants | Class 12

Exam Capsule PPT 
Sexual Reproduction in Flowering Plants - Download

Exam Capsule PPT | Reproduction in Organisms | Class 12

Exam Capsule PPT 
Reproduction in Organisms - Download

Exam Capsule PPT | Plant Growth and Development | Class 11

Exam Capsule PPT 
Plant Growth and Development - Download

Exam Capsule PPT | Respiration in Plants | Class 11

Exam Capsule PPT 
Respiration in Plants - Download

Exam Capsule PPT | Photosynthesis | Class 11

Exam Capsule PPT 
Photosynthesis - Download

Exam Capsule PPT | Cell the Unit of Life | Class 11

Exam Capsule PPT 
Cell the Unit of Life - Download

Exam Capsule PPT | Mineral Nutrition | Class 11

Exam Capsule PPT 
Mineral Nutrition - Download

Exam Capsule PPT | Transport in Plants | Class 11

Exam Capsule PPT 
Transport in Plants - Download

Exam Capsule PPT | Cell Cycle and Cell Division | Class 11

Exam Capsule PPT 
Cell Cycle and Cell Division - Download

Exam Capsule PPT | Anatomy of Flowering Plants | Class 11

Exam Capsule PPT 
Anatomy of Flowering Plants - Download

Exam Capsule PPT | Morphology of Flowering Plants | Class 11

Exam Capsule PPT 
Morphology of Flowering Plants - Download

Exam Capsule PPT | Plant Kingdom| Class 11

Exam Capsule PPT 
Plant Kingdom - Download

Exam Capsule PPT | Biological Classification | Class 11

Exam Capsule PPT 
Biological Classification - Download

Friday, May 14, 2021

Exam Capsule PPT | Locomotion and Movement | Class 11

Exam Capsule PPT 
Locomotion and Movement - Download

Exam Capsule PPT | Chemical Coordination and Integration | Class 11

Exam Capsule PPT 
Chemical Coordination and Integration - Download

Exam Capsule PPT | Neural Control and Coordination | Class 11

Exam Capsule PPT 
Neural Control and Coordination - Download

Exam Capsule PPT | Excretory Products and their Elimination | Class 11

Exam Capsule PPT 
Excretory Products and their Elimination - Download

Exam Capsule PPT | Body Fluids and Circulation | Class 11

Exam Capsule PPT 
Body Fluids and Circulation - Download

Exam Capsule PPT | Breathing and Exchange of Gases | Class 11

Exam Capsule PPT 
Breathing and Exchange of Gases - Download

Exam Capsule PPT | Digestion and Absorption | Class 11

Exam Capsule PPT 
Digestion and Absorption - Download

Exam Capsule PPT | Biomolecules | Class 11

Exam Capsule PPT 
Biomolecules - Download

Exam Capsule PPT | Structural Organization in Animals | Class 11

Exam Capsule PPT 
Structural Organization in Animals - Download

Exam Capsule PPT | Animal Kingdom | Class 11

Exam Capsule PPT 
Animal Kingdom - Download

Exam Capsule PPT | The Living World | Class 11

Exam Capsule PPT 
The Living World - Download

Exam Capsule PPT Class 11 & 12

EXAM CAPSULE Biology PowerPoint Presentations

Biology Exam Capsule PPT for Plus One

Part-1 Botany

  1. Biological classification
  2. Plant kingdom
  3. Morphology in flowering plants
  4. Anatomy in flowering plants
  5. Cell-The unit of Life
  6. Cell cycle and cell division
  7. Transport in plants
  8. Mineral nutrition
  9. Photosynthesis
  10. Respiration in plants
  11. Plant growth n development

Part-2 Zoology 

  1. The living world
  2. Animal Kingdom
  3. Structural Organization in Animals
  4. Biomolecules
  5. Digestion and Absorption
  6. Breathing and exchange of gases
  7. Body fluids and circulation
  8. Excretory products & their elimination
  9. Locomotion and movement
  10. Neural control and co-ordination
  11. Chemical control and co-ordination

Biology Exam Capsule PPT for Plus Two

Part-1 Botany

  1. Reproduction in organisms
  2. Sexual reproduction in flowering plants
  3. Strategies for enhancement in food production
  4. Biotechnology: Principles and processes
  5. Biotechnology and its applications
  6. Organisms and populations
  7. Ecosystem
  8. Environmental issues

Part-2 Zoology

  1. Human Reproduction
  2. Reproductive health
  3. Principles of inheritance and variation
  4. Molecular Basis of Inheritance
  5. Evolution
  6. Human Health and Diseases
  7. Microbes in human welfare
  8. Biodiversity and Conservation


Need other Biology Resources? Click Here

Thursday, April 29, 2021

Acids, Bases and Salts | Class 10 | Activity 2.15 with Solution

Activity 2.15  
  • Heat a few crystals of copper sulphate in a dry boiling tube.
  • What is the colour of the copper sulphate after heating?
  • Do you notice water droplets in the boiling tube? Where have these come from?
  • Add 2-3 drops of water on the sample of copper sulphate obtained after heating.
  • What do you observe? Is the blue colour of copper sulphate restored?

Acids, Bases and Salts | Class 10 | Activity 2.14 with Solution

Activity 2.14
  • Collect the following salt samples – sodium chloride, potassium nitrate, aluminium chloride, zinc sulphate, copper sulphate, sodium acetate, sodium carbonate and sodium hydrogencarbonate (some other salts available can also be taken).
  • Check their solubility in water (use distilled water only).
  • Check the action of these solutions on litmus and find the pH using a pH paper.
  • Which of the salts are acidic, basic or neutral?
  • Identify the acid or base used to form the salt.
  • Report your observations in Table 2.4.

Acids, Bases and Salts | Class 10 | Activity 2.13 with Solution

Activity 2.13  
  • Write the chemical formulae of the salts given below.
  • Potassium sulphate, sodium sulphate, calcium sulphate, magnesium sulphate, copper sulphate, sodium chloride, sodium nitrate, sodium carbonate and ammonium chloride.
  • Identify the acids and bases from which the above salts may be obtained.
  • Salts having the same positive or negative radicals are said to belong to a family. For example, NaCl and Na2SO4 belong to the family of sodium salts. Similarly, NaCl and KCl belong to the family of chloride salts. How many families can you identify among the salts given in this Activity?

Acids, Bases and Salts | Class 10 | Activity 2.12 with Solution

Activity 2.12  
  • Put about 2 g soil in a test tube and add 5 mL water to it.
  • Shake the contents of the test tube.
  • Filter the contents and collect the filtrate in a test tube.
  • Check the pH of this filtrate with the help of universal indicator paper.
  • What can you conclude about the ideal soil pH for the growth of plants in your region?

Acids, Bases and Salts | Class 10 | Activity 2.11 with Solution

Activity 2.11
  • Test the pH values of solutions given in Table 2.2.
  • Record your observations.
  • What is the nature of each substance on the basis of your observations?

Acids, Bases and Salts | Class 10 | Activity 2.10 with Solution

Activity 2.10 
  • Take 10 mL water in a beaker.
  • Add a few drops of concentrated H2SO4 to it and swirl the beaker slowly.
  • Touch the base of the beaker.
  • Is there a change in temperature?
  • Is this an exothermic or endothermic process?
  • Repeat the above Activity with sodium hydroxide pellets and record your observations


Acids, Bases and Salts | Class 10 | Activity 2.9 with Solution

Activity 2.9  
  • Take about 1g solid NaCl in a clean and dry test tube and set up the apparatus as shown in Fig. 2.4.
  • Add some concentrated sulphuric acid to the test tube.
  • What do you observe? Is there a gas coming out of the delivery tube?
  • Test the gas evolved successively with dry and wet blue litmus paper.
  • In which case does the litmus paper change colour?
  • On the basis of the above Activity, what do you infer about the acidic character of:
(i) dry HCl gas
(ii) HCl solution?


Acids, Bases and Salts | Class 10 | Activity 2.8 with Solution

Activity 2.8  
  • Take solutions of glucose, alcohol, hydrochloric acid, sulphuric acid, etc.
  • Fix two nails on a cork, and place the cork in a 100 mL beaker.
  • Connect the nails to the two terminals of a 6 volt battery through a bulb and a switch, as shown in Fig. 2.3.
  • Now pour some dilute HCl in the beaker and switch on the current.
  • Repeat with dilute sulphuric acid.
  • What do you observe?
  • Repeat the experiment separately with glucose and alcohol solutions. What do you observe now?
  • Does the bulb glow in all cases?

Acids, Bases and Salts | Class 10 | Activity 2.7 with Solution

Activity 2.7
  • Take a small amount of copper oxide in a beaker and add dilute hydrochloric acid slowly while stirring.
  • Note the colour of the solution. What has happened to the copper oxide?


Acids, Bases and Salts | Class 10 | Activity 2.6 with Solution

Activity 2.6  
  • Take about 2 mL of dilute NaOH solution in a test tube and add two drops of phenolphthalein solution.
  • What is the colour of the solution?
  • Add dilute HCl solution to the above solution drop by drop.
  • Is there any colour change for the reaction mixture?
  • Why did the colour of phenolphthalein change after the addition of an acid?
  • Now add a few drops of NaOH to the above mixture.
  • Does the pink colour of phenolphthalein reappear?
  • Why do you think this has happened?

Acids, Bases and Salts | Class 10 | Activity 2.5 with Solution

Activity 2.5
  • Take two test tubes, label them as A and B.
  • Take about 0.5 g of sodium carbonate (Na2CO3) in test tube A and about 0.5 g of sodium hydrogencarbonate (NaHCO3) in test tube B.
  • Add about 2 mL of dilute HCl to both the test tubes.
  • What do you observe?
  • Pass the gas produced in each case through lime water (calcium hydroxide solution) as shown in Fig. 2.2 and record your observations.

Acids, Bases and Salts | Class 10 | Activity 2.4 with Solution

Activity 2.4
  • Place a few pieces of granulated zinc metal in a test tube.
  • Add 2 mL of sodium hydroxide solution and warm the contents of the test tube.
  • Repeat the rest of the steps as in Activity 2.3 and record your observations.

Acids, Bases and Salts | Class 10 | Activity 2.3 with Solution

Activity 2.3  

CAUTION: This activity needs the teacher’s assistance.
  • Set the apparatus as shown in Fig. 2.1.
  • Take about 5 mL of dilute sulphuric acid in a test tube and add a few pieces of zinc granules to it.
  • What do you observe on the surface of zinc granules?
  • Pass the gas being evolved through the soap solution.
  • Why are bubbles formed in the soap solution?
  • Take a burning candle near a gas filled bubble.
  • What do you observe?
  • Repeat this Activity with some more acids like HCl, HNO3 and CH3COOH.
  • Are the observations in all the cases the same or different?

Acids, Bases and Salts | Class 10 | Activity 2.2 with Solution

Activity 2.2
  • Take some finely chopped onions in a plastic bag along with some strips of clean cloth. Tie up the bag tightly and leave overnight in the fridge. The cloth strips can now be used to test for acids and bases.
  • Take two of these cloth strips and check their odour.
  • Keep them on a clean surface and put a few drops of dilute HCl solution on one strip and a few drops of dilute NaOH solution on the other. Rinse both cloth strips with water and again check their odour.
  • Note your observations.
  • Now take some dilute vanilla essence and clove oil and check their odour.
  • Take some dilute HCl solution in one test tube and dilute NaOH solution in another. Add a few drops of dilute vanilla essence to both test tubes and shake well. Check the odour once again and record changes in odour, if any.
  • Similarly, test the change in the odour of clove oil with dilute HCl and dilute NaOH solutions and record your observations.

Acids, Bases and Salts | Class 10 | Activity 2.1 with Solution

Activity 2.1 
  • Collect the following solutions from the science laboratory– hydrochloric acid (HCl), sulphuric acid (H2SO4), nitric acid (HNO3), acetic acid (CH3COOH), sodium hydroxide (NaOH), calcium hydroxide [Ca(OH)2], potassium hydroxide (KOH), magnesium hydroxide [Mg(OH)2], and ammonium hydroxide (NH4OH).
  • Put a drop of each of the above solutions on a watch-glass one by one and test with a drop of the indicators shown in Table 2.1.
  • What change in colour did you observe with red litmus, blue litmus, phenolphthalein and methyl orange solutions for each of the solutions taken?
  • Tabulate your observations in Table 2.1


How do Organisms Reproduce | Activity 8.7 with Solution

Activity 8.7 
  • Soak a few seeds of Bengal gram (chana) and keep them overnight.
  • Drain the excess water and cover the seeds with a wet cloth and leave them for a day. Make sure that the seeds do not become dry.
  • Cut open the seeds carefully and observe the different parts.
  • Compare your observations with the Fig. 8.9 and see if you can identify all the parts.

Figure 8.9 Germination

Observation: 
    Two cotyledons of the seed can be observed showing radicle and plumule.
    These parts are similar as shown in the figure 8.9.

How do Organisms Reproduce | Activity 8.6 with Solution

Activity 8.6 
  • Select a money-plant.
  • Cut some pieces such that they contain at least one leaf.
  • Cut out some other portions between two leaves.
  • Dip one end of all the pieces in water and observe over the next few days.
  • Which ones grow and give rise to fresh leaves?
Answer: 
    Portion of Money plant with at least one leaf grows and gives rise to fresh leaves. 
    But money plant without leaf dies.
  • What can you conclude from your observations?
Answer: 
    Money plant with green leaves can synthesize food through photosynthesis and able to grow into a plant, through vegetative propagation.

How do Organisms Reproduce | Activity 8.5 with Solution

Activity 8.5 
  • Take a potato and observe its surface. Can notches be seen?
  • Cut the potato into small pieces such that some pieces contain a notch or bud and some do not.
  • Spread some cotton on a tray and wet it. Place the potato pieces on this cotton. Note where the pieces with the buds are placed.
  • Observe changes taking place in these potato pieces over the next few days. Make sure that the cotton is kept moistened.
Observation: 
    The potato pieces having buds gradually grows and develops. 
    But there is no growth and development in potato pieces without buds.
  • Which are the potato pieces that give rise to fresh green shoots and roots?
Answer:
    The pieces with buds give rise to fresh green shoots and roots.

How do Organisms Reproduce | Activity 8.4 with Solution

Activity 8.4 
  • Collect water from a lake or pond that appears dark green and contains filamentous structures.
  • Put one or two filaments on a slide.
  • Put a drop of glycerin on these filaments and cover it with a coverslip.
  • Observe the slide under a microscope.
  • Can you identify different tissues in the Spirogyra filaments?
Answer: 

Yes. Spirogyra filament consists of many cells attached to form a filament. Spirogyra simply breaks up into smaller pieces upon maturation. These pieces or fragments grow into new individuals.

How do Organisms Reproduce | Activity 8.3 with Solution

Activity 8.3 
  • Observe a permanent slide of Amoeba under a microscope.
  • Similarly observe another permanent slide of Amoeba showing binary fission.
  • Now, compare the observations of both the slides.
Observation: 

In the first slide, an Amoeba cell contains normal cytoplasm and nucleus.

In second slide showing binary fission, dividing nucleus and the constriction in cytoplasm are observed. It indicates that the Amoeba is undergoing binary fission forming two daughter' nuclei.

How do Organisms Reproduce | Activity 8.2 with Solution

Activity 8.2 
  • Wet a slice of bread, and keep it in a cool, moist and dark place.
  • Observe the surface of the slice with a magnifying glass.
  • Record your observations for a week.
Observation: 

A layer of white mass is seen on the slice. It is a mould called Rhizopus.
Area of white mass is increased on subsequent days.
The thread-like structures that developed on the bread are the hyphae of the bread mould.



How do Organisms Reproduce | Activity 8.1 with Solution

Activity 8.1
  • Dissolve about 10 gm of sugar in 100 mL of water.
  • Take 20 mL of this solution in a test tube and add a pinch of yeast granules to it.
  • Put a cotton plug on the mouth of the test tube and keep it in a warm place.
  • After 1 or 2 hours, put a small drop of yeast culture from the test tube on a slide and cover it with a cover slip.
  • Observe the slide under a microscope.
Observation: 
We see yeast reproducing by forming buds.


Wednesday, April 28, 2021

16. Sustainable Management of Natural Resources | Class 10 CBSE | Web Notes

16. SUSTAINABLE MANAGEMENT OF NATURAL RESOURCES

.