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 1 year ago

CBSE > Class 09 > Science

1 answers

Sukhmandeep Kaur 1 year 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 1 year ago

CBSE > Class 09 > Science

2 answers

Ansh Yadav 11 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 1 year 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 1 year ago

CBSE > Class 09 > Science

0 answers

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Why does stone not burn

Posted by Swati Kumari 1 year ago

CBSE > Class 09 > Science

1 answers

Swati Kumari 1 year ago

Because it is a non combustible substance

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I want assignment dissain

Posted by M. Abdul Rahman 1 year ago

CBSE > Class 09 > Science

1 answers

M. Abdul Rahman 1 year 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 1 year ago

CBSE > Class 09 > Science

1 answers

Ananya Rajesh 1 year 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 1 year ago

CBSE > Class 09 > Science

4 answers

Ansh Yadav 11 months, 2 weeks ago

It is called the coverings and protective tissue in plant

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Naina Khullar 1 year ago

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

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Sushil Chaudhary 1 year ago

To protect plants

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Khushi Pundir 1 year ago

To protect the plant

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ANSWER

Which organell has a connection with endoplasmic reticulum

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

2 answers

Sukhmandeep Kaur 1 year ago

Golgi apparatus

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Khushi Pundir 1 year ago

Plasma membrane

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ANSWER

Which is the fluid contai inside the plasma membrane

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

2 answers

Krishna J 1 year ago

Cytoplasm

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Khushi Pundir 1 year ago

Cytoplasm

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Which is the complex substance and provides structural strength to plants

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

3 answers

Nandini Kushwaha 11 months, 3 weeks ago

Sclerenchyma

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Sukhmandeep Kaur 1 year ago

Cellulose

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Khushi Pundir 1 year 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 1 year ago

CBSE > Class 09 > Science

1 answers

Khushi Pundir 1 year ago

Plasma membrane

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What is the meaning of girth

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

5 answers

Arshdeep Kaur 10 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.

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Krishna J 1 year ago

Lateral meristem

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Sushil Chaudhary 1 year ago

Width

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Asmita Mishra 1 year ago

Perimeter, circumference etc

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Khushi Pundir 1 year ago

Width

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Where is apical meristem present

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

4 answers

Nandini Kushwaha 11 months, 3 weeks ago

Tip of root and shoot

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Sushil Chaudhary 1 year ago

Tips of root nd shoot

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Khushi Pundir 1 year ago

At th tip of root and shoot

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Ansh Yadav 1 year 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 1 year ago

CBSE > Class 09 > Science

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What is the YouTube of tissues in multicellular organisms

Posted by Account Deleted 1 year ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is mole and Atom mass

Posted by Arpit Yadav 1 year ago

CBSE > Class 09 > Science

1 answers

Account Deleted 1 year 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 1 year ago

CBSE > Class 09 > Science

5 answers

Account Deleted 1 year 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 1 year 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 1 year 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 1 year 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 1 year ago

From google

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What is a motion and explain

Posted by Jeshwanth Induri 1 year ago

CBSE > Class 09 > Science

4 answers

Account Deleted 1 year 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 1 year ago

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

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Ansh Yadav 1 year ago

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

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Jeshwanth Induri 1 year 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 1 year ago

CBSE > Class 09 > Science

3 answers

Account Deleted 1 year 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 1 year 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 1 year ago

completes

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Differences between mixture element and compound

Posted by Arshiyaa Shaikh 1 year ago

CBSE > Class 09 > Science

2 answers

Account Deleted 1 year 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 1 year 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 1 year ago

CBSE > Class 09 > Science

2 answers

Khushi Chandra 10 months, 1 week ago

1 diagnosis 2 fan 3 tractor 4 telephone

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Account Deleted 1 year 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 1 year ago

CBSE > Class 09 > Science

4 answers

Account Deleted 1 year ago

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

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Account Deleted 1 year ago

What are called canal rays

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Jyoti Maurya 1 year ago

Where are the girl what traditional Indian dresses Santosh

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Prachi Gautam 1 year ago

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

Posted by Dev Pal 1 year ago

CBSE > Class 09 > Science

5 answers

Khushi Pundir 1 year 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 1 year 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 1 year ago

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

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Chitresh Kumar 1 year ago

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

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Gautam Patel 1 year ago

Rutherford model is a watermalen me

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