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Diffusion is important to organisms because it is the process by which useful molecules enter the body cells and waste products are removed. Digested food molecules (amino acids, glucose) move down a concentration gradient from the intestine to the blood. Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products.

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What are the functions of stomata?

Posted by Yeswanth Mass 3 years, 11 months ago

CBSE > Class 09 > Science

4 answers

Akshat Kumar 3 years, 11 months ago

Stomata helps in gas exchange and water movement through transpiration.

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Neha Barthwal 3 years, 11 months ago

Stomata have two main functions, namely they allow for gas exchange acting as an entryway for carbon dioxide (CO2) and releasing the Oxygen (O2) that we breath. The other main function is regulating water movement through transpiration.

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Neeraja D 3 years, 11 months ago

Stomata regulates gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore

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Neeraja D 3 years, 11 months ago

Stomata are composed of a pair specialized epidermal cells referred to as guard cells.

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Types of muscular fibres

Posted by Yeswanth Mass 3 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Neeraja D 3 years, 11 months ago

There are three types of muscle tissue are cardiac muscle, smooth, skeletal.

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Yogita Ingle 3 years, 11 months ago

The three types of muscle fibres are:- Striated muscles, smooth muscles and cardiac muscles.

Striated muscle fibres

Smooth muscle fibres

Cardiac muscle fibres

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What is called sublimation?

Posted by Yeswanth Mass 3 years, 11 months ago

CBSE > Class 09 > Science

3 answers

M U 3 years, 11 months ago

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

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Akshat Kumar 3 years, 11 months ago

Sublimation refers to the change of a solid to gas without going through liquid state.

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Yogita Ingle 3 years, 11 months ago

Sublimation

The phenomenon of change of solid directly to gas or conversion of gas directly to liquid without changing into liquid state is called sublimation. For instance, camphor also called capoor when kept for a long time vanishes. This is due to the sublimation of camphor.

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Neuron looks like?

Posted by Yeswanth Mass 3 years, 11 months ago

CBSE > Class 09 > Science

3 answers

Rashi Gaur 3 years, 11 months ago

Neuron look like a big tree

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Khushi Gupta 3 years, 11 months ago

Neuron looks like badminton

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Neeraja D 3 years, 11 months ago

Neurons have a large number of extensions called dentries. They often look likes branches or spikes extending out from the cell body........

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ANSWER

Gd evening friends

Posted by Neha Jangid ??? 3 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Neha Jangid ??? 3 years, 11 months ago

Ohhhhh!

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A 10 g bullet traveling at 200m/s strikes and remain embedded

Posted by Anshika Yadav 3 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Neeraja D 3 years, 11 months ago

Given, m1=10g=10/100kg m2=2kg u1=200m/s u2=0 m/s Here we use formula m1u1+m2u2=(m1+m2) By using this formula we get, 10/1000×200+2×0=(10/1000+2)v =2+2×0=(10+2000/1000)v 2=(2010/1000)v 2=201/100× v 2×100=201× v 200/201=v V=0.99m/s So the target will move at the speed of 0.99m/s

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How is melting point related to intermolecular forces of attraction? Why is latent heat of fusion.

Posted by Mehak Kumari 3 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Mehak Kumari 3 years, 11 months ago

The intermolecular forces of attraction are the bonds that the particles in the matter form with each other. The stronger the bond, the stronger are the intermolecular forces of attraction between them. When the intermolecular forces of attraction are strong, a higher amount of heat energy will be needed to breaks these bonds and hence the melting point of strong intermolecular forces of attraction will be higher. The latent heat of vaporization is higher than latent heat of fusion because the intermolecular space between gas particles is the greatest and the intermolecular forces of attraction are almost negligible. Hence more energy is needed to convert liquid into a gas. The transition of solid into liquid requires less energy because the energy used for this is only needed to decrease the intermolecular attraction between the particles.

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Why cell membrane called plasma membrane ?

Posted by Siddhi Jain 3 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Kani Mozhi 3 years, 11 months ago

https://meet.google.com/scc-gevp-xab

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Aryan Roy 3 years, 11 months ago

Kddjdfkg

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Name any five unicellular organisms?

Posted by Sumit Kumar 3 years, 11 months ago

CBSE > Class 09 > Science

5 answers

Shashank G .B 3 years, 11 months ago

Bacteria , fungi, algae, protozoa, archea

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R Sanjeev Sanjeev 3 years, 11 months ago

Fungi , algae and bacteria

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Kakku Nononono 3 years, 11 months ago

Bacteria, Protozoa, Fungi, Algae, Archea

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Mohit Chauhan 3 years, 11 months ago

Fungi, Algae, Archea

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Mohit Chauhan 3 years, 11 months ago

Bacteria, Protozoa

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Other name of RBC? Who can answer this question?

Posted by Sumit Kumar 3 years, 11 months ago

CBSE > Class 09 > Science

4 answers

Kartik Gupta 3 years, 11 months ago

Erythrocytes

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Himanshi Gill 3 years, 11 months ago

Erythrocytes

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R Sanjeev Sanjeev 3 years, 11 months ago

Red Blood cell

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Kakku Nononono 3 years, 11 months ago

Thrombocytes

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What is haversain system?

Posted by Sumit Kumar 3 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 3 years, 11 months ago

The osteon or Haversian system is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures. Each Haversian canal generally contains one or two capillaries and nerve fibres. The channels are formed by concentric layers called lamellae. ... These canals are called Haversian canals. Haversian canals are contained within osteons, which are typically arranged along the long axis of the bone in parallel to the surface.

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We know that Newton's first law says that a body at rest will remain at rest or a body at motion will remain at motion untill or unless an external force is applied. Than how a dog moves when it's at rest without any external force?

Posted by Anirudh Nautiyal 3 years, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

How do substance move out of the cell?

Posted by Chumki Seth 3 years, 11 months ago

CBSE > Class 09 > Science

4 answers

Hetvi Patel 3 years, 11 months ago

Through process called diffusion and osmosis

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Kartik Gupta 3 years, 11 months ago

By the process of diffusion and osmosis

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Mohit Chauhan 3 years, 11 months ago

In Facilited diffusion into or out of cells down there concertation gradient through protein channel in the membrane. Simple diffusion and Facilited diffusion are similar in that both involve movement down the concertation gradient

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Yogita Ingle 3 years, 11 months ago

Diffusion involves the movement of substances from a region of higher concentration to a region of lower concentration. Diffusion is an important process for living things as it helps in moving substances in and out of cells.

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ANSWER

Who discovered anode rays ?

Posted by Mohit Chauhan 3 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Khushi Gupta 3 years, 11 months ago

E.Goldstein

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Yogita Ingle 3 years, 11 months ago

An anode ray (also positive ray or canal ray) is a beam of positive ions that is created by certain types of gas-discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein, in 1886. Later work on anode rays by Wilhelm Wien and J. J.

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Who discovered anad rays

Posted by Mohit Chauhan 3 years, 11 months ago

CBSE > Class 09 > Science