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.

0Thank You

Ananya Gupta 1 year, 10 months 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

0Thank You

Ananya Gupta 1 year, 10 months ago

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

0Thank You

Reshma Sheikh 1 year, 10 months ago

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

3Thank You

Reshma Sheikh 1 year, 10 months ago

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

3Thank You

ANSWER

In which chloroplast starch is stored?

Posted by Dhanya Dhanda 1 year, 10 months ago

CBSE > Class 09 > Science

3 answers

Vaidehee Joshi 1 year, 10 months ago

Leucoplast

2Thank You

Reshma Sheikh 1 year, 10 months ago

Amolisis

0Thank You

Dhanya Dhanda 1 year, 10 months ago

Leucoplasts

1Thank You

ANSWER

What is the full form of mns

Posted by Pem Tsewang Serthipa 1 year, 10 months ago

CBSE > Class 09 > Science

4 answers

Tina Singh Chouhan 1 year, 10 months ago

Master of Natural Science,

0Thank You

Pranshu Yadav 1 year, 10 months ago

Master of natural sciences

0Thank You

Dhawal Rawal 1 year, 10 months ago

Master of natural science

0Thank You

Aditya Singh 1 year, 10 months ago

Master of natural science

1Thank You

ANSWER

Difference between voluntary and involuntary muscles

Posted by Japekas Singh Sahni 1 year, 10 months ago

CBSE > Class 09 > Science

2 answers

Nishu Yadav 1 year, 10 months 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

0Thank You

Keneeth Kevin 1 year, 10 months 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

1Thank You

ANSWER

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

Posted by Ritik Ghusinga 1 year, 10 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

I want notes

Posted by Karan Johar 1 year, 10 months ago

CBSE > Class 09 > Science

1 answers

Niku Ola 1 year, 10 months ago

Which chapter

0Thank You

ANSWER

What is the symbol of iron📜🧧

Posted by Anuj Yadav 1 year, 10 months ago

CBSE > Class 09 > Science

5 answers

Vishal Singh Chauhan 1 year, 10 months ago

1Thank You

Sarth Mayuri Mahesh Jadhav 1 year, 10 months ago

1Thank You

Shreya Pandey 1 year, 10 months ago

1Thank You

Nikhil Bhardwaj 1 year, 10 months ago

1Thank You

Satyam Kumar 1 year, 10 months ago

2Thank You

ANSWER

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 1 year, 10 months ago

CBSE > Class 09 > Science

1 answers

Nikhil Bhardwaj 1 year, 7 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.

0Thank You

ANSWER

What are the element of xylem

Posted by Nasima Parween 1 year, 10 months ago

CBSE > Class 09 > Science

3 answers

Suprabha Barik 1 year, 10 months ago

Tracheids, Vessels, Xylem parenchyma and Xylem fibres.

0Thank You

Smriti Gupta 1 year, 10 months ago

Vesicles Xylem phloem Xylem parenchyma Tracheids Xylem fibre

0Thank You

Nikil Rawat 1 year, 10 months ago

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

1Thank You

ANSWER

Explain 2nd law of motion

Posted by Ananya Pal Ix E 1 year, 10 months ago

CBSE > Class 09 > Science

5 answers

Pratiksha Sweety 1 year, 10 months ago

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

0Thank You

Yogita Thakur 1 year, 10 months ago

F = p/t

1Thank You

Aditya Pal 1 year, 10 months ago

Thanks 👍

0Thank You

Tushar Kumar 1 year, 10 months ago

Example= catch the ball

0Thank You

Tushar Kumar 1 year, 10 months ago

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

1Thank You

ANSWER

What is the Newton's second law

Posted by Deepak Joshi 1 year, 10 months ago

CBSE > Class 09 > Science

2 answers

Tushar Kumar 1 year, 10 months ago

Example= catch the ball

1Thank You

Tushar Kumar 1 year, 10 months ago

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

1Thank You

ANSWER

Why *** is harmful

Posted by Adarsh Kumar Singh 1 year, 10 months ago

CBSE > Class 09 > Science

1 answers

Khushi Anushka 1 year, 10 months ago

Yes

0Thank You

ANSWER

G M/R²

Posted by Purabi Sen 1 year, 10 months ago

CBSE > Class 09 > Science

3 answers

Tushar Kumar 1 year, 10 months ago

F=GMm/R^2

0Thank You

Tushar Kumar 1 year, 10 months ago

F=GM1M2

0Thank You

Yash Gupta 1 year, 10 months ago

Correct is GM1M2/r2

0Thank You

ANSWER

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

Posted by Vidya Bharathi / Pankaj Kumar 1 year, 11 months ago

CBSE > Class 09 > Science

4 answers

Priyanshu Yadav 1 year, 10 months ago

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

0Thank You

Nishu Yadav 1 year, 10 months ago

12.5 kg

0Thank You

Purabi Sen 1 year, 10 months ago

Dude , Google exists

0Thank You

Chinmayee A J Chinu 1 year, 11 months ago

75kh

1Thank You

ANSWER

Is egg vegetarion or non vegetarian

Posted by Vardan Bindal 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Chinmayee A J Chinu 1 year, 11 months ago

Vegetarian

4Thank You

ANSWER

Project file for any topic in class 9 in chapter 5

Posted by Ankit Meena 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Anishbbbh Master 1 year, 10 months ago

Mam are you physics teacher

0Thank You

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 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

How to separate mixtures of dyes?

Posted by Nikhil Kumar 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Anishbbbh Master 1 year, 10 months ago

Chromatography technique

1Thank You

Chinmayee A J Chinu 1 year, 10 months ago

Evaporation technique

0Thank You

ANSWER

Calculate the number of protons neutrons and electrons in phosphorus

Posted by Cyril Santhosh 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Smriti Gupta 1 year, 8 months ago

Proton :15 Electron:15 Neutron:16

0Thank You

Chinmayee A J Chinu 1 year, 11 months ago

Protons:15 Neutrons:16 Electron:15

0Thank You

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 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Anishbbbh Master 1 year, 10 months ago

g=GM/r^2

0Thank You

Lucky Singh Sisodiya Sisodiya 1 year, 11 months ago

Polynomial

0Thank You

ANSWER

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 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Jitendra Verma Jitendra 1 year, 10 months ago

Answer

0Thank You

ANSWER

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

Posted by Preet Sagar 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Tushar Kumar 1 year, 10 months ago

5/6

1Thank You

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 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write a short note on smallpox

Posted by Krishna Goyal 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Nikhil Bhardwaj 1 year, 10 months 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.

0Thank You

ANSWER

How plants obtain neutrons

Posted by Karthik K 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is protista definition

Posted by Sahreen Anwar 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Chinmayee A J Chinu 1 year, 11 months ago

They are unicellular eukaryotic organisms

0Thank You

ANSWER

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

Posted by Krishnai Puri 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Baristar Prasad 1 year, 11 months ago

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

0Thank You

ANSWER

What is the function of lysosome

Posted by Devika Prajapati 1 year, 11 months ago

CBSE > Class 09 > Science

3 answers

Chinmayee A J Chinu 1 year, 11 months 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...

1Thank You

Taniya . 1 year, 11 months 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.

1Thank You

Vineet Kumar Saini 1 year, 11 months 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..

3Thank You

ANSWER