CBSE > Class 09 > Science | CBSE Board | Homework Help

Cell is the structural and functional unit of life. Cell helps in respiration , obtaining nutrition. Plant cell is different from animal cell in various region : Plant cell which have cell wall is present. Only one chromosome present in this cell. A large vacuole present in this cell. Plastid are present and they are typically cubed or rectangular shape. Animal cell cell is absent in this cell. More than one chromosome present in this cell. Plastid are absentand also they are generally irregualr shape may be like spherical or round shape.

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Ananya Gupta 2 years ago

plant cell- cell wall present cell wall is the outer covering which provides rigidity and turgidity to the cell vacuoles are big in size plastids are present Animal cell- cell wall absent plasma membrane is the outer covering which provides rigidity to the cell plastids are absent vacuoles are small in size

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Ananya Gupta 2 years ago

Cell is structural and fundamental unit of life helps in respiration,obtaining nutrition,excreting waste materials.

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Reshma Sheikh 2 years ago

Animal cell don't have a cell wall They don't have chloroplast Centriole is present Vacuole is small

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Reshma Sheikh 2 years ago

Plant cell have cell wall They contain chloroplast They do not have centriole Vacuole is large

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ANSWER

In which chloroplast starch is stored?

Posted by Dhanya Dhanda 2 years ago

CBSE > Class 09 > Science

3 answers

Vaidehee Joshi 2 years ago

Leucoplast

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Reshma Sheikh 2 years ago

Amolisis

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Dhanya Dhanda 2 years ago

Leucoplasts

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What is the full form of mns

Posted by Pem Tsewang Serthipa 2 years ago

CBSE > Class 09 > Science

4 answers

Tina Singh Chouhan 2 years ago

Master of Natural Science,

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Pranshu Yadav 2 years ago

Master of natural sciences

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Dhawal Rawal 2 years ago

Master of natural science

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Aditya Singh 2 years ago

Master of natural science

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ANSWER

Difference between voluntary and involuntary muscles

Posted by Japekas Singh Sahni 2 years ago

CBSE > Class 09 > Science

2 answers

Nishu Yadav 2 years ago

Voluntary muscles are those muscle which move according to our will Eg head ,hand and involuntary muscles which do not move according to our will Eg heart ,lungs

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Keneeth Kevin 2 years ago

Voluntary : Muscle which move according to our wish is called as voluntary Muscle Eg - hand, leg Involuntary : Muscle which cannot move according to our wish is called as involuntary Muscle Eg ' brain , heart

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ANSWER

How many moles are present in 5.3 g of anhydrous sodium carbonate?

Posted by Ritik Ghusinga 2 years ago

CBSE > Class 09 > Science

0 answers

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I want notes

Posted by Karan Johar 2 years ago

CBSE > Class 09 > Science

1 answers

Niku Ola 2 years ago

Which chapter

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What is the symbol of iron📜🧧

Posted by Anuj Yadav 2 years ago

CBSE > Class 09 > Science

5 answers

Vishal Singh Chauhan 2 years ago

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Sarth Mayuri Mahesh Jadhav 2 years ago

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Shreya Pandey 2 years ago

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Nikhil Bhardwaj 2 years ago

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Satyam Kumar 2 years ago

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An athelete completes two rounds of a circular track 100m long in 20s . Calculate diameter of the track and speed of athlete , supposed to be uniform

Posted by Devikrishna K Saji 2 years ago

CBSE > Class 09 > Science

1 answers

Nikhil Bhardwaj 1 year, 9 months ago

The diameter of the circular track is given as 200 m. That is, 2r=200 m. From this radius is calculated as Radius, r = 100 m. In 40 sec the athlete complete one round. So, in 2 mins and 20 secs, that is, 140 sec the athlete will complete = 140 / 40 = 3.5 (three and a half) rounds. One round is considered as the circumference of the circular track. The distance covered in 140 sec = 2πr×3.5=2×3.14×100×3.5=2200 m. For each complete round the displacement is zero. Therefore for 3 complete rounds, the displacement will be zero. At the end of his motion, the athlete will be in the diametrically opposite position. That is, displacement = diameter = 200 m. Hence, the distance covered is 2200 m and the displacement is 200 m.

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ANSWER

What are the element of xylem

Posted by Nasima Parween 2 years ago

CBSE > Class 09 > Science

3 answers

Suprabha Barik 2 years ago

Tracheids, Vessels, Xylem parenchyma and Xylem fibres.

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Smriti Gupta 2 years ago

Vesicles Xylem phloem Xylem parenchyma Tracheids Xylem fibre

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Nikil Rawat 2 years ago

Elements of xylem includes: Vesicles Xylem phloem Xylem parenchyma Tracheids Xylem fibre

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ANSWER

Explain 2nd law of motion

Posted by Ananya Pal Ix E 2 years ago

CBSE > Class 09 > Science

5 answers

Pratiksha Sweety 2 years ago

The rate of change in momentum is directly proportional to the applied unbalaced force in the direction of force.

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Yogita Thakur 2 years ago

F = p/t

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Aditya Pal 2 years ago

Thanks 👍

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Tushar Kumar 2 years ago

Example= catch the ball

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Tushar Kumar 2 years ago

The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.

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ANSWER

What is the Newton's second law

Posted by Deepak Joshi 2 years ago

CBSE > Class 09 > Science

2 answers

Tushar Kumar 2 years ago

Example= catch the ball

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Tushar Kumar 2 years ago

The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.

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ANSWER

Why *** is harmful

Posted by Adarsh Kumar Singh 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Khushi Anushka 2 years, 1 month ago

Yes

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G M/R²

Posted by Purabi Sen 2 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Tushar Kumar 2 years ago

F=GMm/R^2

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Tushar Kumar 2 years ago

F=GM1M2

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Yash Gupta 2 years ago

Correct is GM1M2/r2

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If the weight is 75 kg on earth what will be the weight on moon

Posted by Vidya Bharathi / Pankaj Kumar 2 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Priyanshu Yadav 2 years ago

1/6*75=12.5 kg. This is so because the weight of moon is 1/6th of that of the earth.

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Nishu Yadav 2 years ago

12.5 kg

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Purabi Sen 2 years, 1 month ago

Dude , Google exists

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Chinmayee A J Chinu 2 years, 1 month ago

75kh

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ANSWER

Is egg vegetarion or non vegetarian

Posted by Vardan Bindal 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Chinmayee A J Chinu 2 years, 1 month ago

Vegetarian

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Project file for any topic in class 9 in chapter 5

Posted by Ankit Meena 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Anishbbbh Master 2 years, 1 month ago

Mam are you physics teacher

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ANSWER

4) 3 different surfaus of a cuboid are in the ratio 1:213 assuming the constant thrust find the ratio of the (A_{1} / A_{2} / A) pressures respectively.

Posted by Richa Sinha 2 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

How to separate mixtures of dyes?

Posted by Nikhil Kumar 2 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Anishbbbh Master 2 years, 1 month ago

Chromatography technique

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Chinmayee A J Chinu 2 years, 1 month ago

Evaporation technique

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Calculate the number of protons neutrons and electrons in phosphorus

Posted by Cyril Santhosh 2 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Smriti Gupta 1 year, 10 months ago

Proton :15 Electron:15 Neutron:16

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Chinmayee A J Chinu 2 years, 1 month ago

Protons:15 Neutrons:16 Electron:15

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ANSWER

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

Posted by Adarsh Kumar Singh 2 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Anishbbbh Master 2 years, 1 month ago

g=GM/r^2

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Lucky Singh Sisodiya Sisodiya 2 years, 1 month ago

Polynomial

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A ball is gently dropped from a height of 20m. If it's velocity increases uniformily at the rate of 10ms with that velocity will it strike the ground? After what time it strike the ground

Posted by I Love My Love 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Jitendra Verma Jitendra 2 years ago

Answer

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ANSWER

A cube of side 20 cm has a mass of 16 kg . Find its relative density

Posted by Preet Sagar 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Tushar Kumar 2 years ago

5/6

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ANSWER

Two cars Pand Q are travelling along a straight line path on a highway from city A to city B. Car Q travels at a constant rate of 60 km/h for 6 hours and reaches B. Car P travels at 80 km/h for 2 hours, stops at a restaurant for 15 minutes, then travels at 60 km/h for next three hours. Q.36 Total distance travelled by car Q is 10 km (b) 360 km (c) 30 X 5/18 km (d) 360 X 18/5 km Q.37 Average speed of car P is (a) 64.4 km/h (b) 60 km/h (c) 80.8 km/h (d) 45 km/h Q.38 Which of the following is true? (a) Car Q reaches the destination first. (b) Car P reaches the destination first. (c) Both cars reach the destination together. (d) Car P does not reach its destination. Q.39 Motion of car P is (a) uniform (b) uniformly accelerated (c) non-uniform (d) retarded Q

Posted by Lokesh Jain 2 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write a short note on smallpox

Posted by Krishna Goyal 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Nikhil Bhardwaj 2 years ago

Smallpox is a serious and often deadly viral infection. It's contagious — meaning it spreads from person to person — and can cause permanent scarring. Sometimes, it causes disfigurement. Smallpox has affected humans for thousands of years but was wiped out worldwide by 1980 thanks to smallpox vaccines.

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ANSWER

How plants obtain neutrons

Posted by Karthik K 2 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is protista definition

Posted by Sahreen Anwar 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Chinmayee A J Chinu 2 years, 1 month ago

They are unicellular eukaryotic organisms

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ANSWER

How the three states of matter inter convertible ? How can they be interconnected ?

Posted by Krishnai Puri 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Baristar Prasad 2 years, 1 month ago

By the process of evaporation , melting , and boiling. They can be change any state and it can be interconnected

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ANSWER

What is the function of lysosome

Posted by Devika Prajapati 2 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Chinmayee A J Chinu 2 years, 1 month ago

Lysosomes are the disposal system of cellular digestion..It is also known as "suicide bags" it will digest their own cell organelles and excrete worn out cells and toxicity...

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Taniya . 2 years, 1 month ago

Lysosomes function as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself.

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Vineet Kumar Saini 2 years, 1 month ago

The function of lysosome is to engulf germs from the cell and help them in the execration.. These lysosomes are also known as sucidical bags..

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