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    • Posted by Nisarg Chavan 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Ravi Verma 7 years, 1 month ago

    In the organ the energy is require for perform any function and this energy is obtained from food. So transport of material is required for plant and animal

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    • Posted by Vedansh Bajaj 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Vedansh Bajaj 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    Thermodynamics is the sub-division of science that deals with the study of the combined effects of heat and work with changes in state confined by the laws of thermodynamics. Heat energy associated with chemical reactions is converted into different usable forms based on the laws of thermodynamics. The fact that energy can never be created nor destroyed and can only be transformed from one form to the other forms on the basis of energy transformation and its use in different industries is an application of thermodynamics.

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    • Posted by Sarthak Jain 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Vedansh Bajaj 7 years, 1 month ago

    A copper wire can't be used as a fuse wire because it has high melting point. It won't melt easily when a high electric current passes through it and damage the electrical appliances.

    2Thank You

    Yogita Ingle 7 years, 1 month ago

    1. Copper is a good conductor of electricity
    2. Copper is cheap to produce
    3. Copper is a very unreactive metall
    4. Copper is a non-magnetic material. Hence,, the current flowing through it will not be disrupted when there are sudden changes in magnetic field
    5. Copper is malleable (Can be bent without breaking) and ductile (Can be easily drawn into wires)
    6. Copper wire has a relatively low melting point as compared with other metals

    2Thank You

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    • Posted by Raji Vinay 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Chirag Kaushik 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Vedansh Bajaj 7 years, 1 month ago

    निषेचन

    1Thank You

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    • Posted by Jhansi Subudhi 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Vedansh Bajaj 7 years, 1 month ago

    They have a stomach that can digest food outside their body, so that it can fit in their mouth. This allows the food to be further broken down inside the body. Starfish are powerful hunters and primarily feed on mollusks. ... Other starfish hunt in the water, catching sponges, plankton and even coral for their dinner.

    1Thank You

    Ishan Gupta 7 years, 1 month ago

    Starfish feeds on animals covered with shells of calcium carbonate.It opens the shell and then pop out its stomach out of its mouth to eat the soft animal.After eating the stomach goes back and the food is slowly digested.

    1Thank You

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    • Posted by Isha Sambyal 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Ishan Gupta 7 years, 1 month ago

    C6H12O6

    2Thank You

    Nishtha Aggarwal 7 years, 1 month ago

    C6H12O6

    2Thank You

    ANSWER

    • Posted by Harnoor Kaur 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Ishan Gupta 7 years, 1 month ago

    when water is waste it goes to the waste water treatment plant to get purified.

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    • Posted by Jiya Thakur 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    Light is made up of packets of energy called photons which travel in a straight line at a very fast speed. Light can move through small apertures and holes and can change direction, but will always travel in straight lines.

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    • Posted by Elamaran J 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Vedansh Bajaj 7 years, 1 month ago

    Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity. An electromagnet works because an electric current produces a magnetic field.

    1Thank You

    Yogita Ingle 7 years, 1 month ago

    Electromagnets can only attract magnetic materials. Plastic bag is a non-magnetic material and will not be attracted by an electromagnet. Hence, an electromagnet cannot be used for separating plastic bags from a garbage heap. electromagnet can be used for separating plastic bags from a garbage heap

    1Thank You

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    • Posted by Aditya Dutte 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Vedansh Bajaj 7 years, 1 month ago

    Function of right atrium The right atrium is one of the four chambers of the heart. The heart is comprised of two atria and two ventricles. Blood enters the heart through the two atria and exits through the two ventricles. Deoxygenated blood enters the right atrium through the inferior and superior vena cava. The right side of the heart then pumps this deoxygenated blood into the pulmonary arteries around the lungs. There, fresh oxygen enters the blood stream, and the blood moves to the left side of the heart, where it is then pumped to the rest of the body. There is a major difference between the heart of a developing fetus and that of a fully mature adult: a fetus will have a hole in the right atrium. This allows blood to flow straight through to the left atrium. This is significantly important to a fetus' circulatory health. While in the womb, the fetus draws oxygenated blood from its mother. Once born, lungs become necessary and the connection between the two atria closes. Function of left atrium The left atrium is one of the four chambers of the heart, located on the left posterior side. Its primary roles are to act as a holding chamber for blood returning from the lungs and to act as a pump to transport blood to other areas of the heart. The walls of the left atrium are slightly thicker than the walls of the right atrium. Oxygen-rich blood from the lungs enters the left atrium through the pulmonary vein. The blood is then pumped into the left ventricle chamber of the heart through the mitral valve. From there, the blood is ready to be pumped into the body to deliver oxygen-rich blood to all bodily tissues. Mitral valve prolapse is a common affliction in which the mitral valve between the left atrium and left ventricle does not close properly. This condition does not typically require treatment; however, some patients with mitral valve prolapse can develop more serious conditions that require treatment. One such condition is mitral valve regurgitation, in which blood leaks back into the left atrium through the mitral valve.

    1Thank You

    Yogita Ingle 7 years, 1 month ago

    Atria are thin, less muscular walls and smaller than ventricles. These are the blood-receiving chambers that are carried to the heart by the large veins.
    When blood returns to the heart from the body, it fills the right atrium. The tricuspid valve then opens, allowing blood to be pumped to the ventricle below. Then the ventricle contracts and pumps blood through the pulmonary valve to the lungs. The blood returns from the lungs and then fills the left atrium. The mitral valve then opens, allowing blood to pass from the left atrium to the ventricle below. The left ventricle then contracts and the aortic valve opens, allowing blood to travel through the aorta to blood vessels throughout your body.

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    • Posted by Dulari Meena 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    • Soils support roots and keep them upright for growth.
    • Soils provide plants with essential minerals and nutrients.
    • Soils provide air for gaseous exchange between roots and atmosphere.
    • Soils protect plants from erosion and other destructive physical, biological and chemical activity.
    • Soils hold water (moisture) and maintain adequate aeration.

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    • Posted by Jogimahanthi Neeharika 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Siddharth Singh 7 years, 1 month ago

    The process of reproduction in which both parents and *** cells are involved is known as sexual reproduction. The process of reproduction in which only one parent is involved and no *** cells are involved is known as asexual reproduction. Thanks all of you

    1Thank You

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    • Posted by Yashika Saxena 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 5 answers

    Anjali Singh 7 years, 1 month ago

    Red colour

    0Thank You

    Santosh Kumar Deo 7 years, 1 month ago

    Based on litmus if it will red litmus in turn blue if it is blue it remain blue

    0Thank You

    Prabhjot Kaur 7 years, 1 month ago

    No the acid turns blue litmus red

    1Thank You

    Jogimahanthi Neeharika 7 years, 1 month ago

    Blue in colour

    1Thank You

    Ruchi Rajpurohit 7 years, 1 month ago

    Blue

    1Thank You

    ANSWER

    • Posted by Joshua Fernandes 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Jogimahanthi Neeharika 7 years, 1 month ago

    We should always keep first aid kit in our bag

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    • Posted by Abhinav Verma 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 3 answers

    Jogimahanthi Neeharika 7 years, 1 month ago

    Speed =distance/time

    3Thank You

    Harshvardhan Singh 7 years, 1 month ago

    Speed= Distance/Time

    4Thank You

    Pranshu Gupta 7 years, 1 month ago

    Total distance cover ----------------------------------- Total time taken.

    3Thank You

    ANSWER

    • Posted by Santosh Kumar Deo 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Abhinav Verma 7 years, 1 month ago

    Virul

    2Thank You

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    • Posted by Nairita Nath Nath 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Jogimahanthi Neeharika 7 years, 1 month ago

    Sodium bicarbonate

    0Thank You

    Yogita Ingle 7 years, 1 month ago

    Sodium bicarbonate, also commonly known as baking soda, is commonly seen as a white, fine powder and has the chemical formula NaHCO3. It has one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms. It is a very useful chemical that is alkaline in nature.

    1Thank You

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    • Posted by Girivasan Rajan 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Girivasan Rajan 7 years, 1 month ago

    The main reason for this is to be readable by the drivers , ' AMBULANCE is written backwords on the front of the vehicles so the drivers ahead easily read the word from the rear view mirror especially in a case of an emergency.

    3Thank You

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    • Posted by Adithyan M 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    The waste which is present in the blood has to be removed from the body. A system to filter the is required. This is done by the blood capillaries in the kidneys. When blood reaches the two kidneys, it contains both useful and harmful substances.
    The useful substances are absorbed back into the blood after filtration in kidneys. The waste dissolved in water are removed as urine. From the kidneys the urine goes into urinary bladder through tubes called ureters.
    It is stored in the bladder and is passed out through the muscular tube called urethra. The kidneys, ureters, urinary bladder and urethra form the excretory system.

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    • Posted by Arpita Verma 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    1) Convex lens is used in microscopes and magnifying glasses to subject all the light to a specific point.
    2) Convex lens is used as a camera lens in cameras as they focus light for a clean picture.
    3) Convex lens is used in the correction of hypermetropia.
    4) The convex mirror is used as side-view mirror on the passenger side of a car because it forms an erect and smaller image for the way behind the car.

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    • Posted by Harnoor Kaur 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Jogimahanthi Neeharika 7 years, 1 month ago

    He invented microscpe

    0Thank You

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    • Posted by Pushkar Pawar 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    1. The main advantage of vegetative propagation is that the progeny plants contain the genetic material of only one parent.

    For example, if we have a plant of desirable traits, the same plant can be reproduced by vegetative propagation if the growing propagation remains similar.

    2. Vegetative propagation can ensure the consistency of a plant variety or crop variety for sale.

    3. This process also helps to maintain consistent quality and taste of the products made from the plants or crops.

    For example, some tea plants like the Zealong's tea plantations, the new tea plants are made from the cutting using the older plants to ensure uniform consistency in the taste and quality of the tea.

    4. Vegetative propagation can save a lot of time and money for production of plants on a commercial scale.

     

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    • Posted by Thiyaga Rajan 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Gauranshi Vashisth 7 years, 1 month ago

    Virtual image means the image that cannot be obtained on the screen. Erected image means the same side up of the object. Example : If you put a candle in front of a plain mirror you will see that the age is erect.

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    • Posted by Vanshika Chawla 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Thiyaga Rajan 7 years, 1 month ago

    Electromagnet

    2Thank You

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    • Posted by Mayank Mayank 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 3 answers

    Sarthak Jha 7 years, 1 month ago

    Christmas is celebrated on the eve of birth anniversary of lord jesus.It means to live together and remember the teachings of lord Jesus.

    1Thank You

    Vartika Kasera 7 years, 1 month ago

    Its a festival .. u also celebratr?

    0Thank You

    Kandizzz . 7 years, 1 month ago

    Falto question mat kara karo

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    • Posted by Aryan Mishra 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 2 answers

    Rishi Raj 7 years, 1 month ago

    The organism which take food from autotrophs is called heterotrophs

    0Thank You

    Vijayalakshmi J 7 years, 1 month ago

    Organisms which depend on plants or other organisms for their nutrition are called as heterotrophs. They are also known as consumers.

    2Thank You

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    • Posted by Muskan Dwivedi 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 3 answers

    Kandizzz . 7 years, 1 month ago

    After years and years of river inflow and evaporation, the salt content of the lake water built up to the present levels. The same process made the seas salty. Rivers carry dissolved salts to the ocean. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the ocean

    2Thank You

    Riya Yadav 7 years, 1 month ago

    It contains a lot of salt that is sodium chloride

    0Thank You

    ?? ?? 7 years, 1 month ago

    Because of sodium chloride

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    • Posted by Anirudh Singh 7 years, 1 month ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    Velocity is defined as the rate of change of displacement. It is a vector quantity. It can be negative,zero or positive. A body may possess different velocities but the same speed. Velocity can decrease with time. For a moving body , it can be zero. Velocity in SI, is measured in m/s.

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