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I think you are saying that [How does phototropism occur in plants .] Phototropism is the growth of an organism in response to a light stimulus. ... The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs. Thank you

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What is mainly digested by stomach of a man ?

Posted by Sumit Thakur 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Vaishnavi Kanojia 5 years, 3 months ago

Protein digestion occurs in the stomach and duodenum in which 3 main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

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???? ?? ?? ???? ?? ??????

Posted by Sohil Khan 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Sachin Pandey 5 years, 3 months ago

The si unit of amper is electric current and 1amper =10 power -3

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Ayushi Tripathi 5 years, 3 months ago

Ampere is S.I unit of current but Columb/second is also the unit of current. In general term we use ampere.

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Sumit Thakur 5 years, 3 months ago

Ampere or joule per coulomb

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Nehal Arora 5 years, 3 months ago

ampere is the S.I unit of current

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Sohil Khan 5 years, 3 months ago

?? ????

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an object is placed 20cm in front of a place mirror the mirror is moved to set two words the object the distance between the position of the original and final image seen in the mirror .(a) 2 cm (b) 4 cm (c)10 cm (d)22 CM. Which option is correct

Posted by Suhani Guleria 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Lovesh Baswani 5 years, 3 months ago

Initially, the object is placed 20 cm in front of mirror. So the image will form 20 cm behind the mirror. If mirror is moved 2 cm towards the object, distance between object and mirror = 20 cm – 2 cm = 18 cm distance between mirror and image = 18 cm, which is 2 cm less than the initial case. Since, the mirror has also moved 2 cm away from the position of original image, so the total distance between the positions of the original and final images is 2 cm + 2 cm = 4 cmRead more on Sarthaks.com - https://www.sarthaks.com/131305/an-object-is-placed-20-cm-in-front-of-a-plane-mirror-the-mirror-is-moved-cm-towards-the-object

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Is oxidation endothermic or exothermic reaction?

Posted by Sumit Thakur 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Gauri Sharma 5 years, 3 months ago

Exothermic

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Pari Gupta 5 years, 3 months ago

Exothermic

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Lovesh Baswani 5 years, 3 months ago

2H2(g) + O2 (g) → 2H2O

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Aryan Harimon 5 years, 3 months ago

Most probably exothermic

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Yogita Ingle 5 years, 3 months ago

The reaction in which oxygen combines with other elements or compounds is known as an oxidation reaction. For example, burning of hydrogen is an oxidation process in which hydrogen combines with oxygen to form water.

2H₂(g) + O₂ (g) → 2H₂O

Oxidation reactions are exothermic.

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What is the chemical properties of acid and base

Posted by Jyotiraditya Singh 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Suhani Guleria 5 years, 3 months ago

Acid 1- Sour taste. 2- not slippery in touch 3- turn blue litmus to red 4- H+ions on the other hand Base 1-Bitter taste 2-Feel slippery 3-Turn red litmus to blue 4- H-ions on the other hand

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Satyam Lodhi Rajput 5 years, 3 months ago

See in ncert book of cl 10 and any refreser

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What is a balanced chemicals equation?

Posted by Ipshita Singh 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Ayushi Tripathi 5 years, 3 months ago

In the balance equation reactant and product both having equal number of elements.

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Shruti Singh 5 years, 3 months ago

A balanced chemical equation has equal number of atoms of different elements on both reactant as well as product side.

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Satyam Lodhi Rajput 5 years, 3 months ago

It is one that contain equal no of atom of each element on both side of the reaction

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Advantage if series circuit

Posted by Venkataramana Shenoy 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Series Combination:
Advantages:
1. Series circuits do not overheat easily. This makes them very useful in the case of something that might be around a potentially flammable source, like dry plants or cloth.
2. Series circuits are easy to learn and to make. Their simple design is easy to understand, and this means that it’s simple to conduct repairs .
3. we can add more power devices, they have a higher output in terms of voltage .
4. The current that flows in a series circuit has to flow through every component in the circuit. Therefore, all of the components in a series connection carry the same current.

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What happens if egg is not fertilise

Posted by Raju Singh 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Satyam Lodhi Rajput 5 years, 3 months ago

The lining of uterus break and come out through ****** as a blood and mucus this is non as gestation period and is done after every 28 days

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Pratik Sahoo 5 years, 3 months ago

if the egg is not fertilized the uterine lining slowly break down and comes out through the ****** as blood and mucus.

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what is a sels

Posted by Aman Kumar 4 years, 7 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 7 months ago

Sales are activities related to selling or the number of goods sold in a given targeted time period. The delivery of a service for a cost is also considered a sale.

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Draw the electron dot structure (1)ethanoic acid

Posted by Solanki Shivu Solanki Shivi 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Electron-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

As we know that, carbon has '4' valence electrons, hydrogen has '1' valence electron, sulfur and oxygen has '6' valence electrons and fluorine has '7' valence electrons.

Therefore, the total number of valence electrons in ethanoic acid, = 2(4) + 2(6) + 6(1) = 26

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What are neutralization reaction? Why are they named so? Give one example?

Posted by Akansha ..... 5 years, 3 months ago

CBSE > Class 10 > Science

6 answers

Satyam Lodhi Rajput 5 years, 3 months ago

All the base react with acid to form salt and water for ex KOH+H2SO4~K2SO4+H2O

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Satyam Lodhi Rajput 5 years, 3 months ago

All the base react with acid to form salt and water for ex KOH+H2SO4~K2SO4+H2O

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Gunjan Gunjan 5 years, 3 months ago

When acid and base react together to form salt and water is called neutralisation reaction.

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Yash Gurjar 5 years, 3 months ago

Tham runal

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Solanki Shivu Solanki Shivi 5 years, 3 months ago

The reaction between an acid and a base to form a salt and water is called a neutralisation reaction eg: Na+ HCl- NaCL + H2o (2) 2KOH + h2so4 -k2so4 + 2h2o

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Rohit Kumar 5 years, 3 months ago

in which acid and bases react with each other to neutralize each other and former salt + water one example of the following reaction is hydrochloric acid + sodium hydroxide and the products are nacl and water

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Ex of exothermic and endothermic

Posted by Travel On Planet Tours 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Satyam Lodhi Rajput 5 years, 3 months ago

Exothermic ---- CAO+H2O--CA(OH)2+heat Endothermic---- N2+O+heat--- NO

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Prothom Bose 5 years, 3 months ago

1)EXOTHERMIC REACTION=CaO+H2O→Ca(OH)2+heat 2) ENDOTHERMIC REACTION=Ca(OH)2+heat→CaO+H2O

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Rohan took four solutions P, Q, R and S. The pH of solution P is 7, Q is 3, R is 5 and S is 11. Arrange the four solutions in decreasing order of H+ ion concentration.

Posted by Arpan Patil 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

A . 5 years, 3 months ago

Q<R<P<S

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Rohan took four solutions P, Q, R and S. The pH of solution P is 7, Q is 3, R is 5 and S is 11.

Posted by Arpan Patil 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Rupesh Choudhary 5 years, 3 months ago

Oag

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Explain why does aqueous solution of nitric acid conduct electricity but aqueous solution of alcohol does not conduct electricity?

Posted by Arpan Patil 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Electricity is the movement of charge from one place to another place. movement of charges requires a medium. Acids in aqueous solution mean acid in water also called diluted acids. The polar nature of water splits the acid molecules into its cations and anions. Cations and anions are charged particles and are free to move inside the aqueous medium. As a result when a potential difference has applied the solution to conduct electricity.

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What pollination

Posted by Vishesh Soni 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Gauri Sharma 5 years, 3 months ago

? transfer of pollen grains from anther to stigma is called pollination. ? There are two types of pollination ? Cross pollination ? Self pollination

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Yogita Ingle 5 years, 3 months ago

Pollination

Transfer of pollen grains from anther to stigma is termed as Pollination. This transfer of pollen grains occurs with the help of pollinating agents like wind, water, insects, birds etc.

There are 2 types of pollination:

Self pollination

- Transfer of pollen grains from anther to stigma of the same flower

Seen in leguminous plants like pea

Cross pollination

- Transfer of pollen grains from anther of one plant to stigma of the another plant
- Seen in large number of plants like onions, broccoli etc..

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Kiran Thakran 5 years, 3 months ago

Transfer of pollen grain from anther to stigma

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What is the formula for marble

Posted by Abhishek Poonia 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Satyam Lodhi Rajput 5 years, 3 months ago

CaCo3 as calcium carbonate

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Jyoti Kashyap 5 years, 3 months ago

Calcium carbonate ( CaCO3)

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Shubham Saxena ???? 5 years, 3 months ago

Calcium carbonate = CaCO3 .

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Govardhan Saharan 5 years, 3 months ago

CaCO3

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Faridul Haque 5 years, 3 months ago

CaCO3 (Calcium carbonate)

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What are the uses of concave mirror

Posted by Keerthika Dhanam 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 3 months ago

Uses of concave mirrors:

Concave mirrors are commonly used in torches, searchlights and headlights of vehicles to get powerful parallel beams of light.
They are used as shaving mirrors to see a larger image of the face.
Dentists use concave mirrors to view large images of the teeth of the patients.
Large concave mirrors are used to concentrate sunlight in order to produce heat in the solar furnaces.

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Kiran Thakran 5 years, 3 months ago

Used in vehicle Used by dentist Used in torches

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Our stomach contains high concentration of hydrochloric acid. Why does it not harm the wall of the stomach?

Posted by Xyz Mishra 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Jyoti Kashyap 5 years, 3 months ago

Bcz mucus is present in our stomach that protect the wall from the action of HCl acid

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Stuti Dubey 5 years, 3 months ago

Because mucus is present which protects the walls of stomach from the action of hydrochloric acid

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Khushboo Kumari 5 years, 3 months ago

It does not harm the wall of the stomach because mucus protect the inner wall of the stomach from hcl.

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H ? 5 years, 3 months ago

Mucus helps the wall of stomach from harmful effect of HCl

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What is vibgyor

Posted by Talha Azam 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Satyam Lodhi Rajput 5 years, 3 months ago

Group of seven color which pass through glass solution

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Stuti Dubey 5 years, 3 months ago

Vibgyor is the sequence of seven colours that are visible in the rainbow

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Priyal Baldwa 5 years, 3 months ago

The sequence of colours in a rainbow i.e, voilet, indigo, blue, green, yellow, orange, red.

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Why mendel choose pea plant only .

Posted by Pankti Sharma 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Satyam Lodhi Rajput 5 years, 3 months ago

Short life span and produce large no of seeds

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Ankita Pal 5 years, 3 months ago

Mendel choose pea plant for studying inheritance because they are self pollinating and because many generations of pea plant can be produced in a comparatively short time span and their study is much simpler than that of animals.

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Kritika Pathak 5 years, 3 months ago

Mendel's choose pea plant because it has generations more than other plants or humans and it has characteristics. Just suppose, when he research on humans he only saw his two or three generations so he don't research on his work. Then he thought pea plant is correct .

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Incorrect DNA copying can alter the reproduction process. List the effect of such a case

Posted by Priyal Baldwa 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

Incorrect DNA copying or DNA replication during cell division can severly affect the reproduction process. Hence DNA is responsible for every activity from dna copying to protein formation. If protein failed to fold due to mutation then several neurodegenrative disease can occur. Incorrect DNA copying can lead to variations. In this proteins formed are different from the parent and this results in the change in characters in the offspring. This is only due to these variations that evolution occurs.

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what is grana

Posted by Samyak Darshan Thakur Samyak 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

A granum (plural grana) is a stack of thylakoid discs. Chloroplasts can have from 10 to 100 grana. Grana are connected by stroma thylakoids, also called intergranal thylakoids or lamellae. Grana thylakoids and stroma thylakoids can be distinguished by their different protein composition. Primary purpose of grana is not to allow regulation of light harvesting A second, and related, hypothesis for the function of grana is that they allow regulation of light harvesting and, particularly, control of the balance of energy flow between Photosystem II and Photosystem I.

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Draw a well labelled diagram of flowering plant with all parts.

Posted by Khushi Anurag 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Solanki Shivu Solanki Shivi 5 years, 3 months ago

Fr D

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Explain different parts of flowering plant? Please give me ans urgently

Posted by Khushi Anurag 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Bhavika Kharb 5 years, 3 months ago

Most flowers have four main parts: sepals, petals, stamens, and carpels. Sepals: These are the small, leaf-like parts growing at the base of the petals. They form the outermost whorl of the flower. Collectively, sepals are known as the calyx. The main function of the calyx and its sepals is to protect the flower before it blossoms(in the bud stage). Petals: This layer lies just above the sepal layer. They are often bright in colour as their main function is to attract pollinators such as insects, butterflies etc to the flower. The petals are collectively known as the corolla. Stamens: These are the male parts of a flower. Many stamens are collectively known as the androecium. They are structurally divided into two parts: Filament: the part that is long and slender and attached the anther to the flower. Anthers: It is the head of the stamen and is responsible for producing the pollen which is transferred to the pistil or female parts of the same or another flower to bring about fertilization. Pistil: This forms the female parts of a flower. A collection of pistils is called the gynoecium. Style -is a long slender stalk that holds the stigma. Once the pollen reaches the stigma, the style starts to become hollow and forms a tube called the pollen tube which takes the pollen to the ovaries to enable fertilization. Stigma– This is found at the tip of the style. It forms the head of the pistil. The stigma contains a sticky substance whose job is to catch pollen grains from different pollinators or those dispersed through the wind. They are responsible to begin the process of fertilization. Ovary – They form the base of the pistil. The ovary holds the ovules. Ovules– These are the egg cells of a flower. They are contained in the ovary. In the event of a favorable pollination where a compatible pollen reaches the stigma and eventually reaches the ovary to fuse with the ovules, this fertilized product forms the fruit and the ovules become the seeds of the fruit

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I have recently asked questions . Answer my questions .

Posted by Shubham Saxena ???? 5 years, 3 months ago

CBSE > Class 10 > Science