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Why variation are considered extremely important

Posted by Sameer Jaiswal 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Aakriti??? Kumar 5 years, 1 month ago

Variations are important because it allows a organism to easily formulate necessary changes in themselves which in turn increases survival of that species of organism to live easily adapted changeing habitat.. ie.. A camel got adopted to live in dry deserts my only because of variations. These variations are mostly geneticaly.. HOPE IT HELPS Regards ( helping ✋)

Kanishka Varshney 5 years, 1 month ago

Variation is important because its increases the chances of survival in the environment

ANSWER

Briefly explain the process of double circulation with the help of flow chart?

Posted by Deepika Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Laxmi Narayan 5 years ago

Double Circulation The heart is the key organ for blood circulation and the double circulation is an efficient way of circulation as it provides an effective way of circulation. The main difference is that the blood follows two routes – one for oxygenated blood and the other for deoxygenated blood. Hence, the name “double circulation.” The majority of mammals, including humans utilize a double circulatory system. The human heart is divided into four chambers: Left Atria Right Atria Left Ventricles Right Ventricles Further, the heart is connected to the lungs through the pulmonary artery and vein. In double circulation, there are two pathways in which the blood flows. They are: Systemic circulation Systemic circulation carries oxygenated blood from the left ventricles to the tissue capillaries. The oxygen-rich blood is transferred to the aorta for circulating into various parts of the body. Later, the veins and venules collect the deoxygenated blood – which is rich in carbon dioxide from various parts of the body. The deoxygenated blood is pumped back into the superior vena cava and then to the right atrium. Once, after receiving the deoxygenated blood, the right atrium carries blood to the right ventricle for pulmonary circulation. Pulmonary circulation In the pulmonary circulation, the blood circulation starts from the right atrium to the left atrium. In this pathway: The pulmonary artery collects the blood from the right ventricle and carries to lungs for oxygenation. Once, after the purification process, the oxygenated blood is pumped back to the left atrium through the pulmonary vein which is carried to the left ventricles. The left ventricles pump the oxygenated blood to the aorta for systemic circulation. Double circulation supports a strict separation of both oxygenated and deoxygenated blood. Therefore, this circulation ensures that the body always has a dedicated supply of oxygen and also, it improves body efficiency. This is also one of the reasons why mammals can maintain their body temperatures. Apart from the double circulation, a third portal system also exists to improve circulation efficiency.

ANSWER

Why do multicellular organisms use complex way of reproduction?

Posted by Deepika Sharma 4 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 8 months ago

Multicellular organisms cannot reproduce by cell because they are not simple random collection of cells. In them, specialised cells are organized as tissues and tissues are organised into organs, which then have to be kept at different positions in the body. Cell-by-cell division would be impractical. Multicellular organisms, therefore, require to use more complex ways of reproduction. Moreover, simple multicellular organisms possess special type of tissues which have the potential to grow into a new organism but complex multicellular organisms have no such specialised cells.

ANSWER

What kind of small objects composes much of the universe?

Posted by Devendra Pandey 4 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 8 months ago

Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe. As humbling as it sounds, normal matter almost certainly accounts for the smallest proportion of the Universe, somewhere between 1% and 10%.

ANSWER

Ethane, with the molecular formula C2H2 has

Posted by Genius Boy 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Good Day 5 years, 1 month ago

Bhai ethane ka molecular formula C2H6 hota hai

Devendra Pandey 5 years, 1 month ago

IT HAS TWO CARBON ATOM

ANSWER

Explain the mechanism of *** detaninatn

Posted by Account Deleted 4 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 8 months ago

In human beings, the chromosomal mechanism of *** determination is of the XX-XY type. In humans, the nucleus of each cell contains 46 chromosomes or 23 pairs of chromosomes. If the sperm containing Y chromosome fertilises the egg having X chromosome, then the resulting offspring would be a male (XY).

ANSWER

Write the functional group of alcohol carboxylic acid , ke hone & alclchyde

Posted by Account Deleted 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Good Day 5 years, 1 month ago

Function group Alcohol : OH Carboxylic acid : COOH ketone : R-O-R where R is alkyl group Aldehyde : CHO

Aman Yadav 5 years, 1 month ago

Check out page 66 of NCERT book

ANSWER

What is double circulahim ? Why is it necessary

Posted by Account Deleted 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Good Day 5 years, 1 month ago

Mammals have a double circulatory system. This means that during a single cycle, the blood goes twice in the heart. There are two loops in which blood is circulated. One loop is oxygenated and the other is de-oxygenated. This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscles.

ANSWER

What is ohms law ? Write it's mathematical expression with circuit diagram & graph

Posted by Account Deleted 5 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Good Day 5 years, 1 month ago

Potential difference across a metallic conductor is directly proportional to the flow current in a circuit when the physical properties and temperature of conductor remain constant. V = IR where R is constant. R = V/ I

???????⚫ ⚪ 5 years, 1 month ago

Ohm's Law states that the potential difference V of a conductor is directly proportional to the current I,flowing through it provided the temperature remains constant.

Kanishka Varshney 5 years, 1 month ago

Ohm's law At the constant temperature, the current is directly proportional to the potential difference

ANSWER

What is POP ? What is it's ? Formula ? How us prepared ? What happens when it reacts with water

Posted by Account Deleted 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Good Day 5 years, 1 month ago

Plaster of paris, quick-setting gypsum plaster consisting of a fine white powder (calcium sulfate hemihydrate), which hardens when moistened and allowed to dry. Known since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found near Paris. Formula : CaSO4 * 1/2 H2O When water react with water it form gypsum.

ANSWER

What is decomposition reaction ?Write it's 3 types with example

Posted by Account Deleted 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Good Day 5 years, 1 month ago

Types of Decomposition Reactions Decomposition reactions can be classified into three types: Thermal decomposition reaction Electrolytic decomposition reaction Photo decomposition reaction Thermal decomposition is a chemical reaction where a single substance breaks into two or more simple substances when heated. The reaction is usually endothermic because heat is required to break the bonds present in the substance. Examples: Photo decomposition is a chemical reaction in which a substance is broken down into simple substances by exposure to light (photons).

Vaishali 😊😊 5 years, 1 month ago

A reaction in which a single reactant breaks down to from two or more products is known as decomposition reaction . There are three types of decomposition reaction. 1) Thermal decomposition - These reaction use the energy in the from of heat for decomposition of the reactant . Example - 2FeSO4 - Fe2SO3 + SO2 + So3. 2) Electrolysis - These reactions involve the use of electrical energy for the decomposition of the reactant molecules Example - 2H2O - 2H2 + O2. 3) photolysis - These reaction involve the use of light energy for the purpose of decomposition . Example - 2AgCl - 2Ag + Cl2

ANSWER

How to prepare my child for 10th science exams....he doesnot like physics

Posted by Dimple Malhotra 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Mary Stuart 5 years, 1 month ago

Motivate him that physics is easy and yes 10 class physics is very easy Make him understand that this will help him only not me or anyone Ask him what subject he wishes to opt in class 11 after 10 boards result....

ANSWER

X is an indicator added to a dilute solution the colour of the solution turns pink when a substance Y is added to the solution the solution becomes colourless Y also combines with Sodium Hydroxide to form salt that we use in food every day in life . 1.Identify X and Y 2.Give the reaction of Y with sodium hydroxide 3.Name the type of reaction happened here 4.What is pH of Y 5.Write the reaction of Y with zinc metal

Posted by Shivani A Patil 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Kaoushik Ananthan 5 years, 1 month ago

1) X is phenophthalein and Y is HCl 2) HCl + NaOh= NaCl + H2O 3) Neutralization reaction 4) pH = 1 5) 2HCl+Zn=ZnCl2+H2 Hope it helps ?

ANSWER

Chemistry- class-10/ all chemical reaction of ch-1 all unit include ,I think total reaction is out of 60

Posted by Surbhi Kumari 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Surbhi Kumari 5 years, 1 month ago

Give me answers

Surbhi Kumari 5 years, 1 month ago

Please,tell me ,I need help

ANSWER

Write the two parts of the heart which carries deoxygenated and oxygenated blood?

Posted by Deepika Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Mritunjay Y 5 years, 1 month ago

Deoxigenated blood in Right Atrium and Right Ventricle and Oxygenated blood in Left Atrium and Left Ventricle

Hitesh Chandra 5 years, 1 month ago

deoxygenated-Right ventricle and Oxygenated-Left ventricle

ANSWER

How do potato and bryophyllum plants reproduce vegetatively

Posted by Vaibhav Pandey 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Mritunjay Y 5 years, 1 month ago

In Potato small buds are present and also Bryophyllu has small buds then, It reproduce vegetatively

A S 5 years, 1 month ago

Potato by buds called eyes Bryophyllum by leaf as it has small plantlets at its notches .

ANSWER

What are the factors affecting magnetic field of a circular current carrying conductor

Posted by Gulshan Kumar 5 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Tannu Yadav 5 years, 1 month ago

Current,no. Of turns,radii of that loop

Ritika Ritika 5 years, 1 month ago

This answer is wrong

Ritika Ritika 5 years, 1 month ago

1. Magnetic field increase as the current through the wire increase. 2. Magnetic field decrease as the distance from the wire increase.

ANSWER

State ohm's law what is the relation between I, V and R? Draw a graph between V and I if there are 10 volts across a 5 ohm resistor what is the current?

Posted by Gulshan Kumar 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Mritunjay Y 5 years, 1 month ago

According to ohm's; V=IR : V=10volt ,ohm=5ohm .Then,V=IR ,1O=I×5,10/5=I,I=2,Current=2

Kiran Kumari 5 years, 1 month ago

According to ohms law:At any constant temperature current flowing through a conductor is directly proportional to the potential difference. I directly proportional to the v V directly proportional to I Hence v=I×R

ANSWER

What is the chemical formula of baking soda ?

Posted by Tanvi Tomar 5 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Kiran Kumari 5 years, 1 month ago

Sodium hydrogencarbonate. NaHCO3

Ankit Kumar 5 years, 1 month ago

NaHCO3

Akshat Kalkhuriya 5 years, 1 month ago

NAHCO3

Maniya Jain 5 years, 1 month ago

NaHCO3

Aashirwad Sandhu 5 years, 1 month ago

NaHCO3, Sodium Bicarbonate or Sodium Hydrogen Carbonate ..

ANSWER

What is meant by acid

Posted by Riya Narwat 5 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Good Day 5 years, 1 month ago

Those substance which give OH minus or H3o plus when it is dissolve in water is called acid.

Vaibhav Pandey 5 years, 1 month ago

Acids are those substances which dissolves in water to produce H+ or H3O +ions .

Ankit Kumar 5 years, 1 month ago

The highly constrated aqueous solution that ph level lower than 7 and sour in taste is called acid

Tanvi Tomar 5 years, 1 month ago

Acids are those chemical substances which have a sour taste

Saurabh Mahur 5 years, 1 month ago

Acid give H+ ion with aqueous solution Acid is sour in tast

ANSWER

Write the full form of DNA

Posted by Dixit Bhakuni 5 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Maniya Jain 5 years, 1 month ago

Deoxyribo nucleic acid

Tanvi Tomar 5 years, 1 month ago

Dioxyribo nucleic acid

Ayush Dubey 5 years, 1 month ago

Deoxyribo nucleic acid

Vaishali 😊😊 5 years, 1 month ago

Deoxyribo nucleic acid

Shubham Rai 5 years, 1 month ago

deoxyribo nucleic acid *may be spelling is wrong*?

ANSWER

2.Which are called as scavangers?. Single choice. (1 Point) Fungi Plasmodium Virus Diatom

Posted by Dhayanidhi .T.A 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Anuj Agrawal 5 years, 1 month ago

Scavenger are those who eat remaining flesh of an animal.. Ex: wolf Hope u like it...♥️

ANSWER

State and proof joule`s law of heating.

Posted by Prity Lakra 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Good Day 5 years, 1 month ago

Joule’s law of heating states that, when a current ‘i ' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.

ANSWER

What is meant by plant

Posted by Angelin Sarah 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Himanshu Yadav 5 years, 1 month ago

Plant is an living organism which show growth and don't show the movement

ANSWER

Create a terrestrial food chain depicting four trophic levels ?

Posted by Deepika Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Aashirwad Sandhu 5 years, 1 month ago

Grass-Rabbit-wolf-tiger.

ANSWER

Rules of concave and convex mirror

Posted by Divyansh Jindal 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

ANSWER

Ch3-Ch2-Br

Posted by Siddhesh Gosavi 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Kiran Kumari 5 years, 1 month ago

Ethyl bromide or bromo ethyl

Chandresh Tiwari 5 years, 1 month ago

Bromo-ethyle IUPAC name.

ANSWER

Wht is covalent compound??

Posted by Sunil Kumar 5 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Sunil Kumar 5 years, 1 month ago

Thanks all

Kiran Kumari 5 years, 1 month ago

When non metal react with another non metal by sharing of their electron then the compound is called covalent compound.

Ankit Kumar 5 years, 1 month ago

When there formation between the two compounds by the covalant bonding is known as covalant compound

Himanshu Yadav 5 years, 1 month ago

When there formation between the two compounds by the covalant bonding is known as covalant compound

Khushi 5 years, 1 month ago

When a molecule is formed from the covalent bond, such compounds are known as covalent compounds.

ANSWER

What are tropic levels

Posted by Sooraj Saji 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Khushi 5 years, 1 month ago

Each step or level of the food chain forms a trophic level . The autotrophs or the producers are at the first trophic level . They fix up the solar energy and make it available for heterotrophs or the consumers . The herbivores or the primary consumers come at the second ,small carnivores or the secondary consumers at the third and larger carnivores or the tertiary consumers form the fourth trophic level.

ANSWER

Carbon compounds

Posted by Shivkanya Sase 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Shubhi Tiwari 5 years, 1 month ago

The compounds which consist of carbon is called carbon compound. Example- CH4,C2H6,C6H12O6...etc

Himanshu Yadav 5 years, 1 month ago

Compound which form by the carbon that compounds are known as carbon compounds

ANSWER

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