CBSE > Class 10 > Science | CBSE Board | Homework Help

No,we cannot group them together. Reason) Their eyes are very different from each other in the basic structure (analogous). This states that they are not evolved from common ancestors.

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what is tissue?

Posted by Anil Timsina 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shreya ... 6 years, 1 month ago

Group of cells that are similar in structure that work together to perform a particular function.

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How does para mecium obtain its food

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Avika Goel 6 years, 1 month ago

By the help of its cilia

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Shreya ... 6 years, 1 month ago

Paramecium obtain their food through tiny hairs i.e., cilia. They use the cilia to move the food into the oral groove until it reaches the mouth opening.

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Give one example each of unisexual and bisexual flowers different trare between the two type of pollination that ocur in flower. What happens when a pollen lands on a suitable stigma ? Write about the events that occur till the seed formation in the overy

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

0 answers

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What is relation between ethnol and ethyl alcohol

Posted by Yaman Kumar 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shruti Gupta 6 years, 1 month ago

It is the same carbon compound. The only difference is that Ethanol is the common name whereas Ethyl Alcohol is the IUPAC name.

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What would happen to image if we place a concave lens at the focus of convex lens

Posted by Kshitij Vats 6 years, 1 month ago

CBSE > Class 10 > Science

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(a) why did mendel choose garden pea for his experiments write two reasons (b) List two contrasting visible characters of garden pea mendel used for his experiment

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Bhavya Syal 6 years, 1 month ago

3=they have short life span

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Faisal Shaikh 6 years, 1 month ago

1=They were self pollinating which enabled them to produce next generation easily. 2=They have clear cut differences on stem which make easy them to tell apart.

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Name the parts of the human female reproductive system where (1) Fertilization (2) Smplantation occurs. Explain how the embryo gets nutrition inside the mother body.

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Fertilization takes place in fallopian tubes/oviducts. Implantation takes place in uterus.

The embryo gets nutrition inside the mother body through placenta.Placenta is a disc like special tissue which develops between the uterus wall and the embryo after implantation. Its function is the exchange of nutrients, oxygen and waste products between the embryo and the mother.

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Explain in brief how mendel interpreted his results to show that the traits may be dominant or recessive?

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Kshitij Vats 6 years, 1 month ago

In the F1 generation the trait of dwarfness which had seemingly disappeared because all the F1 generation plants had genotype (Tt), reappeared in the F2 generation. The trait of dwarfness had not been lost, it was just suppressed. Since gene T was alone capable of deciding the height of the plant it dominated the trait of dwarfness.

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How to study for exam.

Posted by Bijendra Yadav 6 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Bijendra Yadav 6 years, 1 month ago

KOi kuch to batao yar

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Rajat Bharti 6 years, 1 month ago

do silently study and make a short notes itself in each subject.

1Thank You

Rani Mishra ??? 6 years, 1 month ago

पढ़ाई की प्लेटफॉर्म हैं यह ऐप। बेकार की बात मत लिखा करो। खराब लगता है।

2Thank You

Rani Mishra ??? 6 years, 1 month ago

क्या हैं ये सब। बकवास क्यों करते हो। जबान सभाल के बात करना यार। जबान नीचे गिर जाएगी तुम्हे लेने के देने पर जाएंगे।

2Thank You

Bhavya Syal 6 years, 1 month ago

Do mastrubation

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stars twinkle due to

Posted by Ganesh K 6 years, 1 month ago

CBSE > Class 10 > Science

4 answers

Lucifer??Morningstar?? . 6 years, 1 month ago

Atmospheric refraction

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Kshitij Vats 6 years, 1 month ago

Atmospheric refraction

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Kshitij Vats 6 years, 1 month ago

Atmospheric retraction

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Lucifer??Morningstar?? . 6 years, 1 month ago

Atmospheric refraction

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Cause of speciation

Posted by Bikash Kandulana 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Kshitij Vats 6 years, 1 month ago

Geographical isolation, genetic drift, natural selection and the changing environment.

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Name the physical quantity whose unit is "ohm".

Posted by Nancy Dewangan 6 years, 1 month ago

CBSE > Class 10 > Science

4 answers

Joshi Rira 6 years, 1 month ago

Resistance

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Bikash Kandulana 6 years, 1 month ago

Resistance

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Raushan Kumar 6 years, 1 month ago

Resistance

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Aadya Singh 6 years, 1 month ago

Resistance...

2Thank You

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Draw electron dot structure of acetic acid

Posted by ꧁༺★King K. Tyagi Ji}★༺꧂ ??? 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Himanshu Yadav 6 years, 1 month ago

Why

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Aadya Singh 6 years, 1 month ago

2Thank You

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How to balance equationn??

Posted by Ste Phen 6 years, 1 month ago

CBSE > Class 10 > Science

4 answers

Bikash Kandulana 6 years, 1 month ago

Equal the no of atom present in product side and reactant side

1Thank You

Raushan Kumar 6 years, 1 month ago

By satisfying law of conservation of mass.

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Harsh Kumar 6 years, 1 month ago

Take one side as a left and second as a right then write how many numbers of element in left side and how many are in right then balance it

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Shreya .... 6 years, 1 month ago

Check the no.of atoms of each elements on both the sides. And balance it using hit and trial method.?

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Why do group 1 elements form unipositive ions?

Posted by Lucifer??Morningstar?? . 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shreya .... 6 years, 1 month ago

As we know that, group 1 elements contain 1 electron in their outermost shells. They lose this electron easily to attain the 8 electrons in their outermost shell. So, they form unipositive ion.

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An ore on treatment with dilute HCl produces brisk effervescence. Name the type of ore with one example . What steps will be required to obtain metal ffrom enriched ore? Also write chemical equations for the reactions involved in the process

Posted by Arya Mayekar 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shreya .... 6 years, 1 month ago

The ore is carbonate Ore.
Steps: ◆Calcination ◆Reduction
Example and equation:
Let the ore to be zinc Carbonate. 1)Zinc carbonate---( when heated in absence of O2)----Zinc Oxide + CO2.
2) zinc oxide + carbon monoxide --> Zinc +CO2

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ANSWER

Q-List in proper sequence four steps of obtaining germinating dicot seeds

Posted by Seema Goyal 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Four steps of obtaining germinating dicot seeds are :- (i) Imbibition (ii) Respiration (iii) Effect of light (iv) Mobilization of reserve food

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Q-Define pollination. How does suitable pollination lead to fertilization?

Posted by Seema Goyal 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Lucifer??Morningstar?? . 6 years, 1 month ago

Transfer of pollen grains from anther of a stamen to stigma of a carpel is called pollination

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Q-What is contraception? List four advantages of adopting contraceptive measures.

Posted by Seema Goyal 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Lucifer??Morningstar?? . 6 years, 1 month ago

1) it help to control population. 2)it protect us from sexually transmitted diseases 3)it help in family planning. 4)

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Lucifer??Morningstar?? . 6 years, 1 month ago

The prevention of pregnancy in women (by preventing fertilisation) is called contraception

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What is the biological importance of PH

Posted by Om Prakash Patel 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Importance of pH in Everyday life:

pH change and survival of animals -

Our body works well within a narrow pH range of 7.0 to 7.8.
When the pH of rain water is less than 5.6, it is known as acid rain.
When this acid rain flows into rivers, it lowers the pH of the river water making the survival of aquatic life difficult.

pH in our digestive system

Our stomach produces hydrochloric acid which helps in the digestion of food without harming the stomach.
Sometimes excess acid is produced in the stomach which causes indigestion.
To get rid of this pain, bases called antacids are used.
Antacids are a group of mild bases which react with the excess acid and neutralise it.
Commonly used antacids are magnesium hydroxide [Mg(OH)2] and sodium bicarbonate[NaHCO₃]

pH change - Cause of tooth decay:

Tooth decay starts when the pH in the mouth falls below 5.5. Tooth enamel is made up of calcium phosphate which is the hardest substance in the body. It is insoluble in water but gets corroded when the pH in the mouth falls below 5.5. The bacteria present in the mouth produce acids due to the degradation of sugar and food particles after eating. Hence, to prevent tooth decay, the mouth should be rinsed after eating food and toothpastes which are basic should be used for cleaning teeth to neutralise the excess acid.

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All the best for exam. Sab top karna

Posted by Tanish Chimaniya 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Diksha ? 6 years, 1 month ago

?????

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Ste Phen 6 years, 1 month ago

Neeche se pkka karenge??

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?? Thakur 06 ???? 6 years, 1 month ago

Same to you bro kosish yhi h top krne ke

2Thank You

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An arrangement for observing scattering of light in collidal solution

Posted by Amrit Raj 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Tyndall effect can be defined as the scattering of a beam of light by colloidal particles present in a colloidal solution. This effect can be observed when a fine beam of light passes through a small hole in a dark room. This effect occurs due to the scattering of light by particles of dust or smoke present in the air. The Tyndall effect can also be observed when sunlight passes through the canopy of a dense forest. In the forest, the mist contains tiny droplets of water which act as colloidal particles dispersed in the air.

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