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Nisha Murali 3 years, 8 months ago

SER means: smooth endoplasmic reticulm

Änkit Kümãr 3 years, 8 months ago

SER is a membrane-bound network of tubules without surface ribosomes. SER is not involved in protein synthesis. Its main function is the synthesis of lipids, steroids, and carbohydrates, as well as the metabolism of exogenous substances, such as drugs or toxins. . ..

ANSWER

MCQ 1.what is the fundamental unit of life? (a) cell (b) atom (c) molecule

Posted by Sunil Patro 3 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Shalu Jain 3 years, 8 months ago

Avaneesh ... 3 years, 8 months ago

Cell

Jaskirat Singh 3 years, 8 months ago

"A" option is correct. Ans is -- cell

Palak Tiwari 3 years, 8 months ago

Cell

Suraj Kumar 3 years, 8 months ago

A is correct

ANSWER

W̺h̺a̺t̺ i̺s̺ t̺h̺e̺ d̺i̺f̺f̺e̺r̺e̺n̺c̺e̺ b̺e̺t̺w̺e̺e̺n̺ H̺E̺A̺L̺T̺H̺Y̺ A̺N̺D̺ D̺I̺S̺EA̺S̺E̺ F̺R̺E̺E̺

Posted by Yo ???Yo 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Yo ???Yo 3 years, 8 months ago

Mm ok thank you

Virat Singh 3 years, 8 months ago

Hiiiii don't know

Priyal Gupta 3 years, 8 months ago

Disease free doesn't mean healthy. Healthy mean that a person is physically, mentally and socially fit. But disease free means that a person is free from diseases .

ANSWER

Plant and animal tissue

Posted by Shaik Heena 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 3 months ago

<th>S.NO.</th> <th>PLANT TISSUE</th> <th>ANIMAL TISSUE</th>

1.	There are many dead and supportive tissues in plant cells as compared to the living tissues.	In animals, there are more living tissues as compared to dead tissues.
2.	Plant tissues require very little energy for their maintenance.	Animal tissues require more energy as compared to plant tissues.
3.	There are two kinds of tissues in plants, i.e., permanent tissues and meristematic tissues.	On the other hand, there are four kinds of animal tissues, i.e., muscle tissue, epithelial tissue, connective tissue, and nervous tissue.
4.	Meristematic tissues are required for assisting plant growth. A plant grows with the help of this tissue.	Animals do not have such growth tissues, but they do have reparative growth.
5.	Plants have easier tissue organization.	The tissue organization in animals is quite complex.
6.	Plant tissues have a cell wall.	Animal tissues do not have such cell walls.
7.	Permanent tissues and Meristematic tissue are observed differently in plants.	On the other hand, there is no differentiation between the tissues.

ANSWER

State two differences each between simple tissues of plants.

Posted by Anjali Kumari 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 3 months ago

These tissues are made up of more than one type of cells. The cells of simple tissue perform similar function. The cells of complex tissue may perform different functions. Examples of complex tissues are xylem and phloem.

ANSWER

What produces more servers burns,boiling water or steam?

Posted by Aman Panse 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Saadhikaa Vp 3 years, 8 months ago

Steam

Anjali Kumari 3 years, 8 months ago

Steam produces more severe burns.

Divyansh Singh 3 years, 8 months ago

Steam

ANSWER

What is the angle between the force and displacement in the case of negative work ?

Posted by Kiruthika Saran 3 years, 8 months ago

CBSE > Class 09 > Science

4 answers

Chaithanya Raj 3 years, 8 months ago

180

Ragini Vermma 3 years, 8 months ago

180°

Sriya? Ghosh 3 years, 8 months ago

180°

Shubhrasha Bhowmick 3 years, 8 months ago

90 degree

ANSWER

Why water is called universal solvant?

Posted by Amninder Singh 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Yo ???Yo 3 years, 8 months ago

because it is capable of dissolving more substances

☆ Pranal Rewatkar ☆ 3 years, 8 months ago

Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. ... This allows the water molecule to become attracted to many other different types of molecules

ANSWER

Is there any alternative that is ethical as well as environment friendly

Posted by Prajal Chettri 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which energy is responsible for movement of particles

Posted by Amandhillon12 Ampi 3 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Shaik Heena 3 years, 8 months ago

Kinetic

Divyansh Singh 3 years, 8 months ago

Kinetic energy

Archit Kumar 3 years, 8 months ago

Kinetic energy ,due to the energy of an object is in motion possess kinetic energy

Sumit Jain 3 years, 8 months ago

Kinetic energy

Riya Sharma💜🤞 3 years, 8 months ago

kinetic energy According to the kinetic theory, particles of matter are in constant motion. The energy of motion is called kinetic energy.

ANSWER

Name the tissue which binds skin to the underlying muscles.

Posted by Varsha Singh 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Lavanya Pal 3 years, 8 months ago

Subcutaneous tissue

ANSWER

Mathematical formulation of second law of motion

Posted by Barsha Rani Sahu 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Somansh Sarvesh 3 years, 8 months ago

s= u×t + ½ a×(t)²

Sumit Jain 3 years, 8 months ago

S= ut+1/2at²

Pushprajsinh Rathod 3 years, 8 months ago

F = ma

ANSWER

What does it mean to say that the force of gravity is directly proportional to the masses of the bodies and inversely proportional to the distance between them ?

Posted by Damini Damini 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Virat Singh 3 years, 8 months ago

Uffff

Rishaw Kumar 3 years, 8 months ago

It means that if the masses of objects is increase then the force between them will surely increase. The square of distance between the two objects is inversely proportional to the force.means the if the distance between the object is increase by square then the force between then will decrease.

ANSWER

What are trivalent cation

Posted by Yudhvir Pal 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Mamta Kumari 3 years, 8 months ago

Trivalent cation is a cation in which 3 electrons can be transferred

Gaurav Seth 3 years, 8 months ago

Generally, up to a total of three electrons can be transferred in this way forming Monovalent, Divalent and Trivalent ions. Positively charged ions are known as Cations and negatively charged ions are known as Anions. Therefore, Al₃⁺ is a trivalent cation and S₂^- is a divalent ion.

ANSWER

Answer the following question. Q-12. Explain the universal law of gravity and its calculation form as well as the value of G. Friends only this much thank you. please friends give answer till 9:00 clock. ÖK

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 8 months ago

Newton's universal law of gravitation states that when two body are separated by a distance r, then both attract each other with a force which is directly proportional to the product of their masses (m1 and m2) and inversely proportional to the square of distance between them (r). This force is termed as gravitational force.
Mathematically, gravitation force is given by F= Force = m*a = G(M1*M2)/r^2.

where G is gravitational constant.

Q-11. Figure below shows the to crop field (Plot A and Plot B) have been treated by manures and chemical fertilizers respectively. Keeping other environment factors same. Please friends understand the question and give answer please friend you can image the figure in your mind . (1) Why does the plot B show sudden increase and then gradual decrease in yield? (2). Why is the highest peak in a plot A graph slightly delayed? (3). Why is the reason for the different pattern of the two graphs? please friends give answer till 9:00 clock. ÖK

ANSWER

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 8 months ago

(i) Plot B refers to chemical fertilisers which give short-term benefits because they are nutrient specific. The continuous use of fertilisers in an area destroy soil fertility so there is gradual decrease in yield after sometime.

(ii) Manures help in enriching soil with nutrients and organic matter and increase the soil fertility. They also improve the soil structure. The plot A demonstrates the trend that the addition of manures into the soil have long term benefits in terms of high yield.

(iii) Manures are natural ways of enriching the soil whereas fertilisers are commercially produced plant nutrients. They do not have organic matter like in manure to replenish the soil with useful microbes. Therefore, in plot A manures give high yield while plot B gives high yield for a short time and then it decreases.

ANSWER

Q-10. What are weeds? Give the example of weeds, need to control them and method to control them. please friends give answer till 9:00 clock. ÖK

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Laxmi Bhuyan 3 years, 8 months ago

The unwanted plants which grow along with a cultivated crop are called weeds.. Example - clover, purslane etc By weeding process we can control then..and by using some chemical substances like 2, 4D , Or by using mechanical machines.

ANSWER

Q-8. Why is a Genetically Modified Crops (GMCs)? Name any one such crop with is grown in India. please friends give answer till 9:00 clock. ÖK

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 8 months ago

Crop which has been developed by introducing a new gene from any other source, to obtain the desired character, is called as genetically modified (GM) crop. Bt Cotton is an example of GM crop which is made insect resistant by introducing a gene from a bacteria, Bacillus thuringiensis. It produces a toxin that kills the boll worms that feed on cotton plant.

ANSWER

Q-5. Give scientific reason: why the weight of an object at the equator is less then at the poles? please friends give answer till 9:00 clock. ÖK

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 8 months ago

The weight of an object is less at the equator than at the poles because of the distance of the objects from the centre of the Earth.

We know that the Earth does not has a perfect spherical shape, it is bulged out at the equators.
Thus the distance of the objects that are placed at the equator would be more from the centres as compared to the ones that are kept at the poles.
We know that gravitational force is inversely proportional to the square of the distance therefore, the gravitational force (weight) of the object is less at the equators than the poles.

ANSWER

Give some examples of assertion and reasons with answers

Posted by Pranav Susar 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 3 years, 8 months ago

The concepts of assertion and reasoning have been stated in class 9 syllabus of science for students.

assertion refers to a situation when one is very confident about what he/she is saying. So it involves a positive belief about something and it is generally a fact or a belief.

On the other hand, in case of reasoning, one needs to be presented with a number of logical facts or figures before he/she can believe upon anything. So this is used for methodology and other cases.

But both these terms might not be in relation with one another at the same time.

Example:

Assertion: Light is not considered as matter.
Reason: Light does not occupy space, has no mass or volume.
(a) Both assertion and reason are correct and reason is the correct explanation for assertion.
(b) Both assertion and reason are correct and reason is not the correct explanation for assertion.
(c) Assertion is correct but reason is incorrect.
(d) Both assertion and reason are incorrect.

Complete step by step answer:
> First, let us understand about matter in detail.
> Matter is a substance that has inertia and occupies physical space. As considered to modern physics, matter of various types of particles, each with mass and size. Matter can exist in several states. The three most common states are known as solids, liquids and gas. It is important to know that plasma is not a common state of matter on earth, but it is considered as the most common state in the universe.
Now, let us know about light.
Light is electromagnetic waves, its speed in vacuum is constant, it interacts with matter as a wave-like or a particle-like. In photoelectric effect it behaves as a particle –like, while in the interference it behaves as a wave-like.
For a more in-depth look, if we recall the definition of matter, “matter is anything that has mass and takes up space”. Well, light doesn’t have mass, and it doesn’t take up space; photons don’t repel each other when they get too close together the way atoms do. So, no, light doesn't matter.
Hence, both assertion and reason are correct and reason is the correct explanation for assertion. Therefore, option A is the required answer.

ANSWER

Cell division full explanation with types

Posted by Pranav Susar 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which is more dense ice or steam?

Posted by Ridhima Magdum 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Ridhima Magdum 3 years, 8 months ago

Hi thanks a lot

Aaa - 3 years, 8 months ago

Steam is more dense

ANSWER

How does the atmosphere act as a blanket ?

Posted by Harshita Gupta 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Vinay Kr Thakur 3 years, 8 months ago

Our atmosphere act as blanket because : it keeps the average temperature of the earth fairly constant during the day. The atmosphere prevent the sudden increase the temperature during the day light hours. During the night , it slow down the escape of heat into outer space.

ANSWER

What chapter come in physics Class 9 After deleted cbse

Posted by Vivek Rana 3 years, 8 months ago

CBSE > Class 09 > Science

4 answers

Mayank Vishwakarma 3 years, 8 months ago

Motion Force and laws of motion Gravitation Work and energy

Harshita Gupta 3 years, 8 months ago

Thanks

Chetanpreet Kaur 3 years, 8 months ago

Motion Force and laws of motion Gravitation Work and energy

Bhumika Jaiswal 3 years, 8 months ago

Chapter 1 - Motion Chapter 2 - Force and laws of motion Chapter 3 - gravitation (Thrust and pressure topic is deleted) Chapter 4 - work and energy

ANSWER

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Q-10. What are weeds? Give the example of weeds, need to control them and method to control them.

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Aditi Sinha 3 years, 8 months ago

Easy and simple definition of (weeds is unwanted plants which grow along with main crops).

Yash Malik 3 years, 8 months ago

I hope this answer will help you... ???

Yash Malik 3 years, 8 months ago

A field many other undesirable plants may grow naturally along with the crop. These undesirable plants are called weeds. Weeds are controlled by using certain chemicals called weedicides. Like 2,4-D .

ANSWER

Answer the following question. Q-12. Explain the universal law of gravity and its calculation form as well as the value of G. Friends only this much thank you.

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Muscan Yadav 3 years, 8 months ago

Newton’s Law of Universal Gravitation states that every particle attracts every other particle in the universe with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them. It's unit is 6. 673×10^-11 newton m^2/kg^2

ANSWER

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Q-10. What are weeds? Give the example of weeds, need to control them and method to control them.

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Archit Kumar 3 years, 8 months ago

Unwanted or uncultivated plants that are grown with the crop plant is called weeds.examples ,grass.etc., to control weeds we sprinkle acid .

ANSWER

Answer the following question as required: Q-9. What is Acceleration due to Gravity? Explain formula of relation between g & G and find the value of g.

Posted by Arun Kushwah 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Muscan Yadav 3 years, 8 months ago

Acceleration due to gravity is the acceleration gained by an object due to gravitational force. Its SI unit is m/s2. It has both magnitude and direction, hence, it's a vector quantity. Acceleration due to gravity is represented by g. The standard value of g on the surface of the earth at sea level is 9.8 m/s2.