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  • 1 answers

Yogita Ingle 5 years, 8 months ago

Ultrasonography is a relatively safe diagnostic medical procedure where sound waves are introduced into the body using a transducer. The sound waves bounce off the bones and tissues in the body and produce a black and white image on a monitor. The procedure is safe because it does not use ionizing radiation like an x-ray or CAT scan, which should be avoided in pregnancy.

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Meghna Thapar 5 years, 7 months ago

An echocardiography or an echocardiogram is a noninvasive (the skin is not pierced) procedure used to assess the heart's function and structures. During the procedure, a transducer (like a microphone) sends out sound waves at a frequency too high to be heard. When the transducer is placed on the chest at certain locations and angles, the sound waves move through the skin and other body tissues to the heart tissues, where the waves bounce or "echo" off of the heart structures. These sound waves are sent to a computer that can create moving images of the heart walls and valves.

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Ashutosh Kumar Tiwari 5 years, 8 months ago

we hear the sound by the compressions and rarefactions of air by the sound waves

Gurjashan Preet Singh 5 years, 8 months ago

when sound travel in air then another person observe that we are listening found
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Meghna Thapar 5 years, 7 months ago

Meristematic tissues are growth tissues and found in the growing regions of the plant. According to their position in plant, meristems are apical, lateral and intercalary.

When the cells take up a specific role and lose the ability to divide they form a permanent tissue. This process of taking up a permanent shape, size, and a function is called differentiation. Thus, cells of meristematic tissue differentiate to form different types of permanent tissue. Permanent tissues are of two types – simple permanent tissues and complex permanent tissues.

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Dhruv Kohli 5 years, 8 months ago

1:An object continues to be in rest or uniform motion,unless and until an external unbalanced force acts on it. 2:The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force. 3:To every action,there is an equal and opposite reaction.

Aram Hasan 5 years, 8 months ago

Motion have 3 law
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Meet Saab 5 years, 8 months ago

Manure fertile the land as its natural and on the other hand fertilizers are not fertile in the soil as their artificial
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Dhruv Kohli 5 years, 8 months ago

ATOMIC MASS - NO OF PROTONS=NO OF NEUTRONS 4-2=2

Shubhankar Ambasta 5 years, 8 months ago

2 neutrons

Sanchit Aggarwal 5 years, 8 months ago

2neutron

Paridhi Kaushik. 5 years, 8 months ago

2 neutrons
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Dipak Gupta 5 years, 8 months ago

Yes,they are highly fluid
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Prabhpreet Sardar 5 years, 8 months ago

An ion is an atom or molecule that has a net electrical charge. Since the charge of the electron is equal and opposite to that of the proton, the net charge of an ion is non-zero due to its total number of electrons being unequal to its total number of protons.

Sanchit Aggarwal 5 years, 8 months ago

Ions are charge atom

Divyaansh Dhingra 5 years, 8 months ago

Compounds composed of metal and non-metal contain charged species. These charged species are known as ions.
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Paridhi Kaushik. 5 years, 8 months ago

Its give in your ncert Book pg 49 on top
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Meghna Thapar 5 years, 7 months ago

Host cell is a living cell invaded by or capable of being invaded by an infectious agent (such as a bacterium or a virus). It is a cell that is infected by a virus or another type of microorganism.

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Mansi Reddiar 5 years, 8 months ago

It helps the aquatic leaves to float
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Meghna Thapar 5 years, 7 months ago

Adipose connective tissue – It is basically an aggregation of fat cells called adipocytes. It is found below the skin and between internal organs. The cells of this tissue are filled with fat globules. Storage of fats also lets it act as an insulator. It keeps the visceral organs in position and forms shock-absorbing cushions around kidneys and eye balls.

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Meghna Thapar 5 years, 7 months ago

A  homogeneous  mixture  of  two  or  more  substances  which  are  chemically  non-reacting,  whose composition can be varied within certain limits, is called a solution.

Solution = Solute + Solvent

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Meghna Thapar 5 years, 7 months ago

Mixture is of two types – homogenous mixture and heterogenous mixture.

  1. A mixture which has uniform composition and properties throughout its mass is called a homogeneous mixture. Example: All solutions such as sugar solution, salt solution etc.
  2. A mixture which has a different composition and properties in different parts of their mass is called a heterogeneous mixture. Example: Suspension (sand mixed with salt, sugar in oil) and colloids (milk in water).
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Rinku R.K 5 years, 8 months ago

Gacham

Rinku R.K 5 years, 8 months ago

Ek achcha

Piyush Giri 5 years, 8 months ago

Mollusca are soft layer animal They are found sea Eg.octopus They have hard covering layer made up of calcium carbonate
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Rijah Manahil Tariq 5 years, 8 months ago

->Mass •Mass is measured by the objects inertia. More the mass more the inertia. •It is a property of material, so it dose does not change with place •S.I Unit:kg • Scalar quantity ->Weight •Of an object on earth is the force by which it is attracted towards earth. •As it is force so it has both magnitude and direction (i.e. downwards). •SI unit ‘N’. •W = mass x g. •g changes with location, so does weight.

Ashutosh Kumar Tiwari 5 years, 8 months ago

1.weight is a force. 2.mass is amount of material present inside the given object 3.weight is a vector quantity. 4.mass is a csaler quantity.

Anuj Kumar 5 years, 8 months ago

3 ) Weight changes from place to place . 4 ) weight can be measured with the help of spring balance . MASS : 1 ) Mass of an object is the measure of enersia of an object . 2) SI unit of mass is kg. 3) Mass will remain same throughout the universe. 4) Mass can be measured with the physical balance.

Anuj Kumar 5 years, 8 months ago

WEIGHT : 1) Weight is the force by which an object is attracted towards the centre of the earth . 2 ) It ' s SI unit is Newton .
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Rimjhim Gupta 5 years, 8 months ago

What is host cell

Ashutosh Kumar Tiwari 5 years, 8 months ago

ECG = electrocardiography
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Ashutosh Kumar Tiwari 5 years, 8 months ago

ozone or O3 molecule is triatomic. when UV radiation falls over ozone, it converts into O2 & O then o2&O combine with each other and again form ozone

Aayush Patil 5 years, 8 months ago

CFC

Aayush Patil 5 years, 8 months ago

By CFL
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Ashutosh Kumar Tiwari 5 years, 8 months ago

104 RF

Sukh Ram 5 years, 8 months ago

117
  • 1 answers

Anjali Tiwari 5 years, 8 months ago

Classification of organisms Aristole:-Classified the animals on the basis of,where they live 1. Water 2. Land Cavalier -Smith :-Classified the organisms in 8 kingdoms after that he reduced the kingdom from 8to6. 1.Protozoa 2.Fungi 3.Bacteria 4.Chromista 5. Plantae 6.Animalia Robert H. Whittaker :-Classified the organisms into 5 kingdoms. 1. Monera 2. Protista 3. Fungi 4. Plantae 5. Animalia
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Aram Hasan 5 years, 8 months ago

The disease which are spread by the infected microorganisms is known as infectious disease. Such as bacteria, fungi etc. Infected disease are spread by two types _ 1. Direct contact 2. Indirect contact Direct contact Person to person _ infected disease commonly spread through direct contact. Ex: Touch, kiss , hugs Animals to person _ Humans begin bittering by the infected animals Ex _ dog , monkey Mother to unborn child _ A pregnant woman may pass germs in the baby that cause infected disease to her unborn body. Ex_ to feed baby milk Indirect contact Disease causing organisms also can be passed by indirect contact. Ex- insect bites Mosquitoes can carry the malaria parasite or west Nile virus

Yogita Ingle 5 years, 8 months ago

Infectious Diseases: The diseases which spread due to infection by micro-organisms are called infectious diseases.

When a disease causing organism enters our body it causes infection, it multiplies and grows in the body called host and micro-organisms multiplies in the host body.

For Example: Tuberculosis, tetanus, Common cold, AIDS, etc.

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Yogita Ingle 5 years, 8 months ago

No, it doesn't. Take a object of mass m. Suppose it has travelled a height h. Let the gravitational force be g. In case 1, lt it travel from A to B in a straight path. In case 2, let it travel from A to C in a zig-zag manner, and then to point B. However, in both cases the potential energy will be mgh.

Vassu Yadav 5 years, 8 months ago

No
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Yogita Ingle 5 years, 8 months ago

The number of atoms present in a single molecule is termed as its atomicity. It can be classified into three types.

  • The molecules of many elements are composed of only a single atom of that element. They are termed as monoatomic. For instance, Ar (Argon), He(Helium). So their atomicity is one.
  • On the other hand the molecules of many elements are composed of two atoms of that element. For instance, oxygen can never exist independently and exist as O2 molecule known as diatomic So its atomicity is 2.
  • The molecules of many elements are composed of three atoms of that element. They are termed as triatomic For instance, O3, CO2. So their atomicity is 3.

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