CBSE Class 10 - Science - Ch6 - Gist on Excretory System (Life Processes)

Gist on Excretory System

(Short Q & A)

A Pair Of Kidneys
(image credits: openclipart)

Q1: Define Excretion.

Answer: Excretion is a biological process by which an organism gets rid of metabolic toxic wastes from its body.

Q2: List the toxic wastes of metabolism.

Answer: These wastes are nitrogenous materials i.e. ammonia, urea and uric acid, carbon dioxide, inorganic salts, excess of water.

Q3: What is Osmoregulation? 

Answer: It is a process that maintains the amount of water and ionic balance in the body.

Q4: Where Urea is formed in mammals?

Answer: Urea is made in the liver via the ornithine cycle by combining the ammonia
made by deamination with carbon dioxide made from respiration

Q5: What are the major excretory products of plants?

Class 10 - Biology - How do Organisms Reproduce? (Fill In Blanks)

Class 10 - Biology - How do Organisms Reproduce? 

Cross-section of Flower
credits: clker.com

Fill in the Blanks

[Asexual Reproduction in Plants]

1. The ability of plant cells to give rise to whole plant is called as ____.

2. In Asexual reproduction the gametes are ______ (formed/not formed).

3. In yeasts, ____ is the most common type of asexual reproduction.

4. In grafting, the union occurs through formation of ____ between the two grafts.

5. The process of formation of spores is called ____.

6. Asexual reproduction method in spirogyra is called _______.

7. Orchids and Ornamental Plants are generally reprodued asexually. One of the common vegetative propagation technique used for these plants is _______.

[Sexual Reproduction in Plants]

CBSE Class 10 - Science - CH6 - Life Processes (MCQs)

Life Processes

(MCQs)

Q1: Which of the following type has the longest small intestine?

(a) Carnivores
(b) Omnivores
(c) Herbivores
(d) Autotroph


Q2: Villi are present in

(a) pancreas
(b) stomach
(c) small intestine
(d) oesophagus


Q3: Which of the following metal is associated with heamoglobin?

(a) Aluminum
(b) Iron
(c) Potassium
(d) Calcium

CBSE Class 10 - Science - CH6 Life Processes (Photosynthesis)

Photosynthesis

Photosynthesis Process
credits : original chloroplast image taken from Wikipedia

Q & A

Q1: What is photosynthesis?

Answer: The process by which green plants make their own food from carbon dioxide and water in the presence of sunlight and chlorophyll is called photosynthesis.

During this process, oxygen gas is released. This process can be represented as:

    6CO₂   + 12H₂O    ➞    C₆H₁₂O₆   +    6H₂O +    6O₂

The green plants convert the energy of sunlight into chemical energy by making glucose.
The extra glucose formed changes into starch which is stored in leaves.
The Oxygen released comes from the water.

Q2: Define Translocation.

Answer: Transportation of food from photosynthetic parts of the plant to the non-green part of the plant through phloem is known as translocation.


Q3: What are the important events occur during photosynthesis process?

Answer: The following events occur during this process:

1. Absorption of light energy by chlorophyll.
2. Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen. (Light Reaction)
3. Reduction of carbon dioxide to carbohydrates. (Dark Reaction by Calvin Cycle)

Q4: Mention the conditions for photosynthesis. Also, mention the process involved in each of these steps.

CBSE Class 10 - Science - NTSE (Biology) Quiz - 18

NTSE Biology Quiz-18

Q1: We found heterotropic mode of nutrition in which of the following:
(a) Opuntia
(b) pistia
(c) Vallisneria
(d) Drosera


Q2: Which of the following is an example of insectivorous plant?
(a) Orobanche
(b) Rafflesia
(c) Cuscuta
(d) Drosera


Q3: Insectivorous plants
(a) are heterotropic
(b) can get supplementary protein food
(c) cannot manufacture their food other than carbohydrates
(d) cannot manufacture their own proteins

CBSE Class 10 - Biology - Heredity and Evolution (MCQs)

Heredity and Evolution

(MCQs)

Q1: Which type of variation is inherited?

(a) Somatic Variation
(b) Germinal Variation
(c) Both Somatic and Germinal
(d) None of these


Q2: The organs which perform different functions but have the same basic structure are called:

(a) Vestigial organ
(b) Analogous organs
(c) Homologous organs
(d) Analytic organs

CBSE Class 10 - Science - CH 16 - Management of Natural Resources (Q and A)

Management of Natural Resources

Why do we need to use our resources carefully?

Q & A

Q1(CBSE 2011): What is coliform bacteria? What does its presence in water indicate?

Answer: Coliform is a group of bacteria which is found in human intestines. Its presence in water indicates contamination by disease-causing microbes. Its high presence in rivers and ponds elevates the risks of water borne diseases like gastroenteritis.

Q2(CBSE 2011): State two reasons of launching "Ganga Action Plan". Which bacteria was found in Ganga water indicating contamination?

CBSE Class 10 - Science - Ch 16 - Management of Natural Resources (Worksheet)

Management of Natural Resources

(Worksheet)

Recycling is important for ecological stability
credits:openclipart

Fill in the blanks

1. ________________ is a group of bacteria, found in human intestines, whose presence in water indicates contamination by disease-causing microorganisms.

2. The ______ of water is something that can easily be checked using universal indicator.

3. The three R’s to save the environment are __________, ___________ and ___________.

4. _________ means that you use less.

CBSE Class 10 - Science - How do Organisms Reproduce? (Formative Assignment)

How do Organisms Reproduce? 

(Formative Assignment)

Q(Teachers FA Manual): Fill up the a crossword puzzle as per the clues given below:

NTSE SAT Quiz-15 (Biology)

NTSE SAT Quiz-15 (Biology)

Biology Quiz

Q1: Which of the following is a Gram positive bacteria?

(a) Cyanobacteria
(b) Eschericilia
(c) pseudomonas
(d) Preumococus

Q2: Cell wall in cork is impervious to water and gases due to the presence of 

(a) Lignin
(b) Suberin
(c) Cellulose
(d) Pectin

CBSE Class 10 - Science - CH8 - How do Organisms Reproduce? (MCQs)

Class 10 - Biology - How do Organisms Reproduce? 

Cross-section of Flower
credits: clker.com

MCQs

Q1(FA Manual): The information source for making proteins is

(a) Rough Endoplasmic reticulum
(b) DNA
(c) Hormones
(d) Enzymes

CBSE Class 10 - Science - Ch14 - Sources of Energy

Sources of Energy 

(Q & A)

Q1: Fill in the blanks.
(a) Hydro power plants convert _________ energy of falling water into electricity.

(b) When wood is burnt in a limited supply of oxygen, ______ is left behind as residue.

(c) Gases like ______, _____, ______ and ______ are generated in a biogas plant.

(d) Biogas contains _____ % methane.

(e) To maintain the required speed of the turbine, wind speed should be higher than _____.

(f) To establish 1 MW generator, the wind energy farm needs about ___ hectares of land.

(g) Ocean Thermal Energy plants can operate if the temperature difference between the water at the surface and water at depths up to ______ km is _______ or more.

(h) ______ and _______ countries have number of power plants based on geothermal energy.

Answer:

Branches of Biology

Eye of Jumping Spider
Photo by Thomas Shahan; Source: Flickr

Branches of Biology

1. Biology: study of  living organisms.

2. Botany:  study of plants.

3. Zoology: study of animals.

4. Morphology: study of internal and external structures of organisms (plants and animals) organs.

5. Histology: study of tissues.

CBSE - Class X - Science - Ch7 - Control and Coordination

Human Brain
(credits:wpclipart.com)

MCQs, NCERT Chapter Solutions, Q & A

Q1: The plant hormone which is essential for cell division is
(a) Ethylene
(b) Auxin
(c) Gibberellin
(d) Cytokinin

Answer:  (d) Cytokinin

Class 10 - Biology - CH6 - Life Processes (#cbsenotes)

Life Processes

MCQs, NCERT Chapter Solutions and other Q & A

☛ See Quiz Life Processes


Q1. The kidneys in human beings are a part of the system for
(a) nutrition.
(b) respiration.
(c) excretion.
(d) transportation.

Answer: (c) excretion.


Q2. The xylem in plants is responsible for
(a) transport of water.
(b) transport of food.
(c) transport of amino acids.
(d) transport of oxygen.

Answer: (a) transport of water.

Class 10 - Science - Ch9 - Heredity and evolution (Q & A)+NCERT Solutions

Heredity and evolution 

(Q & A)+NCERT Solutions 

Apeman evolution

Q1: Define Heredity.

Answer: Heredity refers to the process by which certain features (heritable characteristics) are transmitted from parent to offspring.

Q2: Define Variation.

Answer: Offsprings of same parents do not exactly resemble each other as well as to their parents.  It is known as variation.

Explore Biodigital Human Body in 3D

The website BioDigitalHuman provides interactive 3D Human body and anatomical systems views.

To view the website you need a browser supports HTML5 and WebGL. Chrome supports these. I think you need to install plugins in Firefox and IE9+. You need a broadband connection to view the site. No doubt it has been the award winning site.

CBSE - Class 10 - Biology - Chapter 15 - Our Environment

Chapter: Our Environment

Q1: Define Ecology

Answer: Ecology is a scientific study of the interactions between organisms and the environment. Ecology integrates all areas of biological research and  informs environmental decision.

Q2: What is the scope of Ecology Research?

Answer: Ecology study can be broadly classified as:
           a. Organismal Ecology
           b. Population Ecology
           c. Community Ecology
           d. Ecosystem Ecology
           e. Landscape Ecology
           f. Global Ecology

In nutshell, Ecology study advocates protection of nature and the environment.

Q3: Define Ecosystem.

Answer: An environment comprises of all living (biotic) and non-living (abiotic) things that occur naturally on the Earth or any of its region. All these living organisms interact with each other and their growth, reproduction and other activities are affected by the abiotic components of ecosystem.

Q4: Is garden an example of Ecosystem?

Answer: Yes. In an garden, all biotic components (e.g. plants, trees, animals like rats, frogs, birds, insects etc.) interact with each other and with abiotic components (garden soil, water etc.) for their growth and reproduction and other activities. Thus garden forms an ecosystem.

Q5: Give examples of natural ecosystems.

Answer: Forests, ponds, lakes, sea, oceans, coral reefs, rivers etc.

Q6: Give examples of human made (artificial )ecosystems.

Answer: Gardens, Crop-fields etc.

Class 10 - Biology - How Do Organisms Reproduce? (Very Short Questions & Answers)

 How Do Organisms Reproduce? 

Avocado Seed
credits:wpclipart

Very Short answer Questions asked in board examinations. 
Q1: Why simply copying of DNA in a dividing cells not enough to maintain continuity of life?

Answer: Copying of DNA along with creation of an additional cellular apparatus is necessary.

Q2: How does plasmodium undergo fission?

Answer: Plasmodium divides into many daughter cells simultaneously

Q3: How spirogyra reproduces by fragmentation?

Answer: Breaks up into smaller pieces, on maturation each fragment grows into new individual.

Q4: Which cells are responsible for budding in Hydra?

Answer: Regenerative cells

Q5: On which plant can you find buds on its leaves?

Answer: Bryophyllum

Q6: Write the scientific name of the bread mould.

Answer: Rhizopus

Class 10 - Biology - How Do Organisms Reproduce? (Very Short Questions)

Very Short answer Questions asked in board examinations. 

Q1: Why simply copying of DNA in a dividing cells not enough to maintain continuity of life?
Q2: How does plasmodium undergo fission?
Q3: How spirogyra reproduces by fragmentation?
Q4: Which cells are responsible for budding in Hydra?
Q5: On which plant can you find buds on its leaves?
Q6: Write the scientific name of the bread mould,
Q7: Name the structure into which following develops : the plumule and radicle?
Q8: Where are the testes located in human beings?
Q9: For what specific reason have the testes specific location?
Q10: Correlate the rate of general body growth and maturation of reproductive tissue during
puberty?