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How do substances like co2 and water move in and out of cell ?

Posted by Rachana Sonicha 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 5 months ago

The substances like CO₂ and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO₂ and water is higher in external environment than that inside the cell, CO₂ and water moves inside the cell. When the concentration outside the cell becomes low and it is high inside the cell, they moves out.

ANSWER

1. __________ protects the cell against pathogens. 2. ___________ is study of living organism. 3. __________ is commonly called the physical basis of life. 4.The nucleoplasm posses a mass of genetic material known as __________. 5.In plants, golgi bodies are called ______.

Posted by Music Lover? 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Rakesh Dahiya 4 years, 5 months ago

2_ biology

ANSWER

Explain prokaryotes and eukaryotes?

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Music Lover? 4 years, 5 months ago

Prokaryotes: very minute in size,nuclear region not surronded by nuclear membrane means nuclear membrane is absent and single chromosome present. For example : bacteria. Eukaryotes:large in size,nucleus surrounded by nuclear membrane. More than one chromosomes are present. For example:humans ??

ANSWER

Why mercury is used in glass themometers.explain.

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Palak Burman 4 years, 5 months ago

Mercury is used in glass thermometer because it doesn't stick with glass and since Mercury is highly poisonous.

Yogita Ingle 4 years, 5 months ago

Most metals are good conductors of heat and are solid at room temperature. Mercury is the only metal that is in liquid state at room temperature. It’s used in thermometers because it has a high coefficient of expansion. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked. The mercury expands and contracts with the changes in the temperature. The mercury thermometers are used in laboratory experiments, households and industrial applications.

ANSWER

Liquid generally have low density as compared to solids.but you must have observed that ice floats on Water.find out why?

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Miss__ Thakur 4 years, 5 months ago

Because ice has some pores over it...due to this density of ice become less and hence it floats on water

ANSWER

Define compressibility?

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Priya Sahani Priya 4 years, 5 months ago

Gas state is more compressible than solid and liquid compressiblity meaning the thing which can be compress .

ANSWER

What will happen when solid ammonium chloride is heated?

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Palak Burman 4 years, 5 months ago

It will directly change to the vapour state without passing through the liquid state.The process is known as sublimation.

Yogita Ingle 4 years, 5 months ago

Test tube of ammonium chloride (NH4Cl) being heated over a bunsen burner flame. Ammonium chloride decomposes readily when heated, but condenses in the cooler area at the top of the test tube. This is a reversible reaction, where the ammonium chloride decomposes into the gases ammonia (NH₃) and hydrogen chloride (HCl).

ANSWER

Why do solids generally lack the property of diffusion?

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Harsh Kumar 4 years, 5 months ago

Because solid have intermolecular force more than liquid and gas

Palak Burman 4 years, 5 months ago

This is because of the abcense of translatory motion in the solid state since state the particles are very closely packed.?

Yogita Ingle 4 years, 5 months ago

There exists strong intermolecular force of attraction between the atoms of solids, due these forces they bind strongly with each other, effects the diffusion property which is there in gases.

ANSWER

Butter is generally wrapped in wet cloth during summer if no refrigerator is available.explain.

Posted by Palak Burman 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Palak Burman 4 years, 5 months ago

In summer ,the weather is a quite hot. As a result,water present in wet cloth readily evaporates. Since cooling is caused during evaporation,the temperature of butter gets lowered.this checks the rancidity of butter or it doesn't give any foul odour.

Yogita Ingle 4 years, 5 months ago

Normally, butter melts due to heat in summers, unless stored in adequate coolness.

If refrigerator is not available in a household, butter is wrapped in a wet cloth to provide the required cooling.

When the water from the wet cloth evaporates, the butter wrapped inside becomes cooler and thus remains in solid state even during summers.

ANSWER

Is the meaning of matter

Posted by Gaurav Bhardwaj 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Priya Sahani Priya 4 years, 5 months ago

Anything which have mass and occupy space called matter

Music Lover? 4 years, 5 months ago

Anything that ocupies space and has mass and is felt by senses os called matter

Palak Burman 4 years, 5 months ago

Anything which has mass and occupies space is known as matter.

Lavan Kush 4 years, 5 months ago

Anything which occupie space is called as matter

Gaurav Bhardwaj 4 years, 5 months ago

Anything is made by the occupied space or volume is known as matter

ANSWER

10g of common salt is dissolved in 120ml of solution.calculate concentration of the solution

Posted by Chekuri Mallikarjunarao 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Chekuri Mallikarjunarao 4 years, 5 months ago

10 grams of common salt is dissolved in 120 ml of of solution solution to stop c o n c e n t r a t i o n of the tuition ok solution

ANSWER

A body starts rolling over a horizontal surface with an initial velocity of 0.5m/s2square Due to friction its velocity decreases. at the rate of 0.05 m/square .How much time it take for body to stop.

Posted by Avinash Bhandari 4 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which soil is derived from basaltic rock ( a)red soil (b)black soil (c)laterite soil (d) both a and c

Posted by Suresh Kumar 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Prerna Vibhute 4 years, 5 months ago

Answer is (c) laterite soil

Lavan Kush 4 years, 5 months ago

(C)

ANSWER

What is human body

Posted by Arti Devi8484 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 5 months ago

The human body exhibits a variety of movements from walking, bending and crawling to running, jumping and climbing. The framework that enables us to do all these activities is the skeleton. Humans have as much as 300 bones at birth. However, the bones start to fuse with age. At adulthood, the total number of bones is reduced to 206.

ANSWER

Q1.) choose the correct options for the following questions: (1)The largest cell in the human body is: 1)Nerve cell 2)Muscle cell 3)Kidney cell

Posted by Varun Sain 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Hanamata Patil 4 years, 5 months ago

Nerve cell

Akarsh Kumar 4 years, 5 months ago

Nerve cell

Jatin Singh 4 years, 5 months ago

Nerve cell

Yash Srivastava 4 years, 5 months ago

Nerve cell

Shashi Bala 4 years, 5 months ago

Nerve cell

ANSWER

What is hetrogenous and homogeneous mixture

Posted by Priya Sahani Priya 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Christy Mathew 4 years, 5 months ago

Homogeneous is a type of mixture which is also called true solution. The particle size is smaller than 1 nanometre. The solute in a homogeneous mixture spread throughout uniformly. Example is sugar in water. Heterogeneous mixtures on the other hand is a kind of mixture in which the solute is not evenly distributed throughout the solution like oil in water. There are two types of heterogeneous mixtures suspension and colloid.

Sourish Nandan 4 years, 5 months ago

Homogeneous mixture is a solid, liquid, gaseous mixture that has the same proportion of its components throughout any given sample. Heterogeneous mixture has components in which proportions vary throughout the sample.

ANSWER

Define latent heat of vaporosation

Posted by Roshan Ruchal 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 5 months ago

The term latent heat of vaporisation can be defined as the amount of heat needed for the conversion of 1kg of liquid at its boiling point to gas at same temperature. It differs among different liquids.

ANSWER

Define melting point.???

Posted by Keziah Preethi 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Diwakar Dhyani 4 years, 5 months ago

Thanks

Rishi Singh 4 years, 5 months ago

The point at which ice melts to form liquid is called melting point

ANSWER

Fire ? can be seen in molecular form explain?

Posted by Anu Radha 4 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which Sounds is travel fast

Posted by Abhishek Jaiswal 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Palak Burman 4 years, 5 months ago

Sounds is travelled fastest in solid.

Yash Thakkar 4 years, 5 months ago

Sounds travel fastest in solids

ANSWER

What is element 118 in periodic table

Posted by Yash Thakkar 4 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Priya Sahani Priya 4 years, 5 months ago

The pure substance which cannot be broken by chemical method is called an element

Yash Thakkar 4 years, 5 months ago

Does it exists

Kartikay Singh 4 years, 5 months ago

Oganesson

ANSWER

Explain an activity the particles of matter are very small

Posted by Rupesh Kumar 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Suraj Kymar Suraj Kumari 4 years, 5 months ago

instruction give below is an incomplete flow chart on cell organells

ANSWER

First multi cellular organism

Posted by Md Tanvir Ahmed 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 4 years, 5 months ago

The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago. Examples: Amoeba and Paramecium, both unicellular. Algae, or plant-like protists, have characteristics of plant cells. Examples: Chlamydomonas (unicellular), Volvox and kelp (both multicellular).

ANSWER

Why if the moon suddenly disappeare

Posted by Yash Thakkar 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 4 years, 4 months ago

And since the ocean is so big, all the water from one horizon pushes up against water from the other, resulting in a fantastic tidal bulge. If the moon disappeared, we wouldn't be totally out of tidal luck; the sun also stretches and squeezes the Earth, so our surfing opportunities wouldn't be completely eliminated. Since the moon affects the altitude and movement of Earth's water, our ocean tides would shrink. Scientists suggest that without the moon, tides would be 1/3 of the size they are now. High tides would be much smaller than they are now, and low tides would be even lower.

ANSWER

What is the chemical formula of sodium chloride and calcium oxide

Posted by Nandini Majumdar 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 4 years, 5 months ago

Sodium chloride is one of the most well-known and widely used chemicals, also known as table salt. Formula and structure: The chemical formula of sodium chloride is NaCl and its molar mass is 58.44 g/mol. It is an ionic compound consisting of a sodium cation (Na+) and a chloride anion (Cl-).

Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.

ANSWER

Define cell ?

Posted by Jaspreet Kaur 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Rishi Singh 4 years, 5 months ago

Cells are the structural and functional unit of life.

Nidhi Dhariwal 4 years, 5 months ago

Cell is the fundamental unit of life because Cells - Tissue - Organs - Organ System - Organism

Bitter Truth 4 years, 5 months ago

Cell is morphological and physiological unit of life

Sachin Garg 4 years, 5 months ago

life

Sachin Garg 4 years, 5 months ago

Basic functions such as reproduction,development,growth,respiration are essential for our survival. These functions are performed by different cells and cell are also known as functional and basic unit of light.

ANSWER

How can we liquefy gases

Posted by Shubham Rathi 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Niyati Yadav 4 years, 5 months ago

By reducing temperature and increasing pressure

Yash Thakkar 4 years, 5 months ago

By the process of condensation

ANSWER

Write one similarity between Golgi apparatus and vacuoles.

Posted by Arbind Sharma 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Arbind Sharma 4 years, 5 months ago

One similarity between Golgi apparatus and vacuoles is 1) they both can store materials.

ANSWER

Which of the following are matter? Chair, love, air, smell, hate, almond, cold, thought, lemon water, smell of perfume

Posted by Pragya Latika 4 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Shubham Saini 4 years, 5 months ago

Matter- Chair, air, almonds, cold drink. Not Matter- Love, smell, hate, thought, cold, smell of perfume.

Jaspreet Kaur 4 years, 5 months ago

Chair , smell , almond , lemon water , smell of perfume , air , cold drink are matter.

Yash Thakkar 4 years, 5 months ago

Chair, air, smell, almond, cold drink, lemon water and smell of perfume are matter

ANSWER

Any two example of double parent cell

Posted by Tanisha Shukla 4 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

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