CBSE > Class 09 > Science | CBSE Board | Homework Help

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why is cell called the structure and functional unit of life ❓

Posted by Rechal Bhalla 10 months ago

CBSE > Class 09 > Science

1 answers

Sukhmandeep Kaur 10 months ago

It is called functional unit because it can perform all its functions like respiration ,digestion ,excretion and it is called structural unit because all living organism are made up of cells (i.e. it is the smallest unit of life )

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Write any four distinctive features of cardiac muscles

Posted by Subha Kushwaha 10 months ago

CBSE > Class 09 > Science

2 answers

Ansh Yadav 9 months, 2 weeks ago

It a involuntary It present in heart Its shape is cylindrical It produces a relexation to body

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Ananya Agrawal 10 months ago

They are present in heart . They are a type of involuntary muscles .they are elongated and cylindrical in stuctute

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Describe Rutherford's alpha particle scattering experiment. Write the postulates of Rutherford's model of atom. Write drawback of Rutherford's model of atom.

Posted by Account Deleted 10 months ago

CBSE > Class 09 > Science

0 answers

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Why does stone not burn

Posted by Swati Kumari 10 months ago

CBSE > Class 09 > Science

1 answers

Swati Kumari 10 months ago

Because it is a non combustible substance

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I want assignment dissain

Posted by M. Abdul Rahman 10 months, 1 week ago

CBSE > Class 09 > Science

1 answers

M. Abdul Rahman 10 months, 1 week ago

Design

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An object of mass 100 kgs of acceleration uniformly form a velocity of 5 m per second to 8 m second second square in 6 seconds calculate the initial and final momentum of the object also find the magnitude of the force expected on the object

Posted by Sai Eshwar 10 months, 1 week ago

CBSE > Class 09 > Science

1 answers

Ananya Rajesh 10 months ago

800 kg m s−1. Force exerted on the object is 50 N.

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What is the role of epidermis in plants.

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

4 answers

Ansh Yadav 9 months, 2 weeks ago

It is called the coverings and protective tissue in plant

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Naina Khullar 10 months ago

It has a coating of cutin to prevent the loss of water

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Sushil Chaudhary 10 months, 1 week ago

To protect plants

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Khushi Pundir 10 months, 1 week ago

To protect the plant

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ANSWER

Which organell has a connection with endoplasmic reticulum

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

2 answers

Sukhmandeep Kaur 10 months ago

Golgi apparatus

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Khushi Pundir 10 months, 1 week ago

Plasma membrane

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Which is the fluid contai inside the plasma membrane

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

2 answers

Krishna J 9 months, 4 weeks ago

Cytoplasm

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Khushi Pundir 10 months, 1 week ago

Cytoplasm

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Which is the complex substance and provides structural strength to plants

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

3 answers

Nandini Kushwaha 9 months, 2 weeks ago

Sclerenchyma

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Sukhmandeep Kaur 10 months ago

Cellulose

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Khushi Pundir 10 months, 1 week ago

Cell membrane

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Which is the outermost covering of the cell that surprise the contents of the cell from its external environment

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

1 answers

Khushi Pundir 10 months, 1 week ago

Plasma membrane

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What is the meaning of girth

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

5 answers

Arshdeep Kaur 8 months ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Krishna J 9 months, 4 weeks ago

Lateral meristem

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Sushil Chaudhary 10 months, 1 week ago

Width

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Asmita Mishra 10 months, 1 week ago

Perimeter, circumference etc

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Khushi Pundir 10 months, 1 week ago

Width

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Where is apical meristem present

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

4 answers

Nandini Kushwaha 9 months, 2 weeks ago

Tip of root and shoot

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Sushil Chaudhary 10 months, 1 week ago

Tips of root nd shoot

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Khushi Pundir 10 months, 1 week ago

At th tip of root and shoot

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Ansh Yadav 10 months, 1 week ago

Apical meristem present in growth of plants

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Whet is the utility of tissues in multi cellular organisms

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

0 answers

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What is the YouTube of tissues in multicellular organisms

Posted by Account Deleted 10 months, 1 week ago

CBSE > Class 09 > Science

0 answers

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What is mole and Atom mass

Posted by Arpit Yadav 10 months, 2 weeks ago

CBSE > Class 09 > Science

1 answers

Account Deleted 10 months, 1 week ago

Molecular mass of an element is defined as the sum of the masses of the elements present in the molecule. Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule.

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Anyone can give some assertion reason question related to work and energy

Posted by Gideon Shaji Sam 10 months, 2 weeks ago

CBSE > Class 09 > Science

5 answers

Account Deleted 10 months, 1 week ago

Q.3. Assertion : The graph between two physical quantities P and Q is straight line, when P/Q is constant. Reason : The straight line graph means that P is proportional to Q or P is equal to constant multiplied by Q.

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Account Deleted 10 months, 1 week ago

Q.2. Assertion : Displacement of an object may be zero even if the distance covered by it is not zero. Reason : Displacement is the shortest distance between the initial and final position.

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Account Deleted 10 months, 1 week ago

Directions: In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as: (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false. (d) Both Assertion and Reason are false. Q.1. Assertion : An object may acquire acceleration even if it is moving at a constant speed. Reason : With change in the direction of motion, an object can acquire acceleration.

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Rishika Singh 10 months, 1 week ago

Assertion the sum of kinetic energy and potential energy is called mechanical energy Reason the sum of kinetic energy and potential energy = constant

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Rajeev Kataria 10 months, 2 weeks ago

From google

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What is a motion and explain

Posted by Jeshwanth Induri 10 months, 2 weeks ago

CBSE > Class 09 > Science

4 answers

Account Deleted 10 months, 1 week ago

We can define motion as the change of position of an object with respect to time. A book falling off a table, water flowing from the tap, rattling windows, etc., all exhibit motion. Even the air that we breathe exhibits motion! Everything in the universe moves.

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Krishna Tripathi 10 months, 2 weeks ago

When a body change its position with the respeat of time is said to be motion

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Ansh Yadav 10 months, 2 weeks ago

When any object change its position with respect of time and reference of points is called motion

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Jeshwanth Induri 10 months, 2 weeks ago

What is a motion

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A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator. If you could measure the temperature of the content of the tumbler, which of the following graph would correctly represent the change in its temperature as a function of time

Posted by Shagun Verma 10 months, 2 weeks ago

CBSE > Class 09 > Science

3 answers

Account Deleted 10 months, 1 week ago

represents the change of temperature with time correctly. The temperature of water first decreases up to zero degree celcius then remains constant for sometime (till the ice is formed), then again starts decreasing.

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Account Deleted 10 months, 1 week ago

During melting, the heat equal to latent heat of fusion and during boiling, heat equal to latent heat of vaporisation is used to overcome the inter particle force of attraction. Therefore, temperature remains constant.

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Passang Droma 10 months, 2 weeks ago

completes

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Differences between mixture element and compound

Posted by Arshiyaa Shaikh 10 months, 2 weeks ago

CBSE > Class 09 > Science

2 answers

Account Deleted 10 months, 1 week ago

The key difference between compounds and mixtures is that a compound is made up of molecules, each of which is composed of two or more different types of chemically bound atoms. While the mixture is a combination of two or more elements or compounds that are combined physically rather than chemically.

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Rishika Singh 10 months, 1 week ago

Mixture may be hetrogeneous or homogeneous

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Science and technology for society in the various fields 1 health 2 Lifestyle for environment 3 agriculture 4 communication and Transportation 5 computational thinking

Posted by Khushi Chandra 10 months, 2 weeks ago

CBSE > Class 09 > Science

2 answers

Khushi Chandra 8 months, 1 week ago

1 diagnosis 2 fan 3 tractor 4 telephone

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Account Deleted 10 months, 1 week ago

Science and technology have simplified our lives. They have made our sleeping, cooking, and commuting processes easier and faster, respectively, with the help of objects such as A.C., microwaves, and vehicles!

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Can I get the question answer ch 4

Posted by Ansumi Chetia 10 months, 2 weeks ago

CBSE > Class 09 > Science

4 answers

Account Deleted 10 months, 1 week ago

How do thomson's model of an atom describe about ☺️

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Account Deleted 10 months, 1 week ago

What are called canal rays

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Jyoti Maurya 10 months, 2 weeks ago

Where are the girl what traditional Indian dresses Santosh

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Prachi Gautam 10 months, 2 weeks ago

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What are the limitations of Rutherford's model of the atoms ?

Posted by Dev Pal 10 months, 3 weeks ago

CBSE > Class 09 > Science

5 answers

Khushi Pundir 10 months, 1 week ago

His model was failed to explain that how the electrons were revolving around circular path without falling into the centre of the atom that is nucleus

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Account Deleted 10 months, 1 week ago

His model failed to explain the stability of atoms. The arrangement of electrons in a circular path was not defined. Any particle that is moving in a circular path would undergo acceleration and radiates energy. Thus, the revolving electron would lose energy and finally fall into the nucleus.

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Ansh Yadav 10 months, 2 weeks ago

Rutherford model discovered a proton in1886 Rutherford ford take a gold foil and pass a rays

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Chitresh Kumar 10 months, 2 weeks ago

Rutherford model of an atom doesn't has neutron and energy levels

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Gautam Patel 10 months, 2 weeks ago

Rutherford model is a watermalen me

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