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Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans

Posted by Bhuvana Shree 2 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Prakash Ram 2 years, 11 months ago

Every living cell requires oxygen for performing cellular respiration. In unicellular organisms the single cell is in direct contact with environment. Oxygen passes into it through diffusion. In simple multicellular organisms every cell may also get oxygen through diffusion from environment. This is not possible in complex multicellular organisms like humans. The body is covered by dead cells. The living cells are not in contact with external environment. Air containing intercellular spaces are absent. Therefore, quick diffusion cannot occur. Cell to cell diffusion is a very slow process. Passage of oxygen from lungs to toes through cell to cell diffusion will take about three years. Therefore, diffusion cannot meet the oxygen requirement of multicellular organisms like humans

ANSWER

Practical chapter 1 hydrogen gas

Posted by Deepak Prashar 2 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Mahendra Kalar 2 years, 11 months ago

Why physics sir used red colur

ANSWER

Provide me sample paper of this year

Posted by Ashish Kumar 2 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Excretion in plant

Posted by Anas Rashid 2 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Account Deleted 2 years, 11 months ago

Excretion is carried out in the plants in the following ways: The gaseous wastes, oxygen, carbon dioxide, and water vapor are removed through the stomata of leaves and lenticels of stems. Some waste products collect in the leaves and bark of trees. When the leaves and bark are shed, the wastes are eliminated.

ANSWER

11340÷210

Posted by Sana . 2 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Jasmeen Kaur 2 years, 11 months ago

54

Anonymous 2 years, 11 months ago

54

Arpita Mishra 2 years, 11 months ago

84

ANSWER

If ∆ n = 0 then it will be exothermic or endothermic reaction?

Posted by Md Aqudas Alam Ansari 3 years ago

CBSE > Class 10 > Science

1 answers

Rajesh Rajesh 3 years ago

Exothermic reaction

ANSWER

Give an example of a Double displacement recation

Posted by Kratika Gupta 3 years ago

CBSE > Class 10 > Science

2 answers

Jasmeen Kaur 3 years ago

Simply = NaSo+BaCl→BaSo + Nacl Balanced= Na²So⁴+BaCl²+BaSo⁴+2NaCl

Account Deleted 3 years ago

Na2So4 +BaCl2 gives BaSo4 + 2 NaCl

ANSWER

Define main focus of a convex lens

Posted by Payal Payal 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

Radius of curvature... Definition

Posted by Shipali Choudhary 3 years ago

CBSE > Class 10 > Science

1 answers

Prakash Ram 2 years, 11 months ago

The radius of a hollow sphere of which the spherical mirror forms a part is called radius of curvature. It is also denoted by R.

ANSWER

A copper wire has diameter 0.5mm and resistivity of 1.6×10‐8 ohm meter what will be the length of this wire to make its resistance 10 ohm how much does the resistance change if the diameter is doubled

Posted by Akshaya Keerthy 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

I need flow chart of light reflection and refraction

Posted by Shubh Keshari 2 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Umang Rawal 2 years, 11 months ago

Light is reflected in our lenses but I don't no the answer

Anonymous 2 years, 11 months ago

Search on google

ANSWER

What do you mean by fusion

Posted by Naitik Nehra 3 years ago

CBSE > Class 10 > Science

1 answers

Aspirant Aspirant 3 years ago

Intermixing of two different kinds of particles is called fusion.

ANSWER

What is the meaning of life process

Posted by Anshika Singh 3 years ago

CBSE > Class 10 > Science

4 answers

Prakash Ram 2 years, 11 months ago

Life processes are those basic actions and functions of living beings which are essential for their survival or maintenance. They are also called maintenance process

Anonymous 2 years, 11 months ago

The processes that are necessary for an individual for his Survival is known as life process

Raunak Yadav 3 years ago

The basic function performed by the living organisms to maintain their life on the earth 🌍

Dhruv Doyle 3 years ago

The processes that are necessary for an individual for his Survival

ANSWER

What is the meaning of life process

Posted by Anshika Singh 3 years ago

CBSE > Class 10 > Science

1 answers

Vinay Kowshik 3 years ago

Life process is the process which is done inside the body of an organism to sustain its life . It's of four types: • Nutrition • Respiration • Transportation • Excretion

ANSWER

What is the universal indicator

Posted by Janak Patel 3 years ago

CBSE > Class 10 > Science

1 answers

Janak Patel 3 years ago

Universal indicator is a mixture of many indicator. The universal indicator draws different colours from different concentrations of hydrogen on in a solution.

ANSWER

What factors could lead to rise of a new species?

Posted by Jasmeen Kaur 3 years ago

CBSE > Class 10 > Science

2 answers

Muhammad Amaan Rahman 𝔸𝕄𝔸𝔸ℕ 𝕄𝕌ℍ𝔸𝕄𝕄𝔸𝔻 3 years ago

Species: 1.Species are defined as a group of organisms that interbreed or exchange genes with each other. 2.The formation of new species is called speciation. New species arise due to several factors: 1.Natural selection. 2.Geographical isolation. 3.Reproductive isolation. 4.Genetic mutation.

Sahiba Bansal 3 years ago

Species is a group of organisms that exchange their genes...there could be so many factors like natural selection, geographic isolation etc

ANSWER

What are amphoteric oxides? Give two examples of amphoteric oxides.

Posted by Jasmeen Kaur 3 years ago

CBSE > Class 10 > Science

1 answers

Muhammad Amaan Rahman 𝔸𝕄𝔸𝔸ℕ 𝕄𝕌ℍ𝔸𝕄𝕄𝔸𝔻 3 years ago

The oxides which behave as both acidic and basic oxides are called amphoteric oxides. Examples- aluminium oxide (Al²O³), zinc oxide (ZnO).

ANSWER

PbS reacts with ozone (O3) and forms pbso4. As per the balanced equation, molecules of ozone required for every one molecule of PbS is / are (a) 4 (b) 3 (c) 2 (d) 1

Posted by Rufaidah Nayab 3 years ago

CBSE > Class 10 > Science

1 answers

Muhammad Amaan Rahman 𝔸𝕄𝔸𝔸ℕ 𝕄𝕌ℍ𝔸𝕄𝕄𝔸𝔻 3 years ago

Therefore, every 1 molecule of requires 4 molecules of ozone.

ANSWER

Methane burn in oxygen to from carbon dioxide and water

Posted by Prince Singh 3 years ago

CBSE > Class 10 > Science

2 answers

Muhammad Amaan Rahman 𝔸𝕄𝔸𝔸ℕ 𝕄𝕌ℍ𝔸𝕄𝕄𝔸𝔻 3 years ago

Yes, it's prove by equation.The balanced equation is CH4+2O2→CO2+2H2O.

Prince Singh 3 years ago

Methane burn in oxygen to from carbon dioxide and water

ANSWER

Kis kis ko result ka tension hai batao

Posted by Ankit Class 3 years ago

CBSE > Class 10 > Science

2 answers

Sudhir Verma 2 years, 11 months ago

H Mujhe

Anonymous 2 years, 11 months ago

Mujhe

ANSWER

Find out 10 strong and weak acid with example

Posted by Dx Divya 3 years ago

CBSE > Class 10 > Science

1 answers

Muhammad Amaan Rahman 𝔸𝕄𝔸𝔸ℕ 𝕄𝕌ℍ𝔸𝕄𝕄𝔸𝔻 3 years ago

1.Strong Acids Strong acids dissociate completely into their ions in water, yielding one or more protons (hydrogen cations) per molecule. There are only 7 common strong acids. 1.HCl - hydrochloric acid 2 HNO3 - nitric acid 3H2SO4 - sulfuric acid (HSO4- is a weak acid) 4.HBr - hydrobromic acid 5.HI - hydroiodic acid 6.HClO4 - perchloric acid 7.HClO3 - chloric acid Examples of ionization reactions include: 8.HCl → H+ + Cl- 9.HNO3 → H+ + NO3- 10.H2SO4 → 2H+ + SO42- Note:1.the production of positively charged hydrogen ions and also the reaction arrow, which only points to the right. All of the reactant (acid) is ionized into product. 2.Weak Acids Weak acids do not completely dissociate into their ions in water. For example, HF dissociates into the H+ and F- ions in water, but some HF remains in solution, so it is not a strong acid. There are many more weak acids than strong acids. Most organic acids are weak acids. Here is a partial list, ordered from strongest to weakest. 1.HO2C2O2H - oxalic acid 2.H2SO3 - sulfurous acid 3.HSO4 - - hydrogen sulfate ion 4.H3PO4 - phosphoric acid 5.HNO2 - nitrous acid 6.HF - hydrofluoric acid 7.HCO2H - methanoic acid 8.C6H5COOH - benzoic acid 9.CH3COOH - acetic acid 10.HCOOH - formic acid Weak acids incompletely ionize. An example reaction is the dissociation of ethanoic acid in water to produce hydroxonium cations and ethanoate anions: CH3COOH + H2O ⇆ H3O+ + CH3COO- Note:2.the reaction arrow in the chemical equation points both directions. Only about 1% of ethanoic acid converts to ions, while the remainder is ethanoic acid. The reaction proceeds in both directions. The back reaction is more favorable than the forward reaction, so ions readily change back to weak acid and water.

ANSWER

What is nutrition? ( Bio) class 10

Posted by Palak Gupta 3 years ago

CBSE > Class 10 > Science

4 answers

Anonymous 2 years, 11 months ago

The process by which an organism intake food and utilize it to provide energy for growth, maintenance and development is called nutricent

Raunak Yadav 3 years ago

Hii sonika love you

Raunak Yadav 3 years ago

The process of taking food and utilisation by the body is called nutririon

Sonika Yadav 3 years ago

The process by which an organism intake food and utilize it to provide energy for growth, maintenance and development

ANSWER

Write the balanced chemical equation of aluminium +copper chloride gives aluminium chloride +copper

Posted by Diya Siby 3 years ago

CBSE > Class 10 > Science

1 answers

Prince Sharma 3 years ago

2Al (s) + 3CuCl² (aq) ---> 2AlCl³ (aq) + 3Cu (s)

ANSWER

State three characteristics of resistors connected in series?

Posted by Jasmeen Kaur 3 years ago

CBSE > Class 10 > Science

1 answers

Aryan Rohilla 3 years ago

Solid, liquid, gas

ANSWER

Answer

Posted by Sneha Taliyan 3 years ago

CBSE > Class 10 > Science

2 answers

Maya Shukla 3 years ago

Question

Prince Sharma 3 years ago

Question

ANSWER

Convex lens f =10 cm an object is placed in 20 cm, find position of image

Posted by Sneha Taliyan 3 years ago

CBSE > Class 10 > Science

3 answers

Jasmeen Kaur 2 years, 11 months ago

Using formula mirror formula and magnification

Ankit Class 3 years ago

V = 20/3 cm = 6.66cm

Aryan Rohilla 3 years ago

21°

ANSWER

Why is the colour of copper II sulphate is blue vitrial in colour

Posted by Rajeshwari Singh 3 years ago

CBSE > Class 10 > Science

1 answers

Preeti Dabral 3 years ago

In hydrated CuSO4, the water molecules surrounding the Central Metal (Cu) act as ligands resulting in $d$-d transition and therefore emitting blue colour in the visible region due to which hydrated CuSO4 appears blue.

ANSWER

Why silver bromide is kept in bottle

Posted by Aditya Raj 3 years ago

CBSE > Class 10 > Science

1 answers

🥱🥱 ... 3 years ago

as it decomposes when comes in contact with direct sunlight

ANSWER

What is the main cause of charge on a body?

Posted by Jyoti Kaushik 3 years ago

CBSE > Class 10 > Science

1 answers

Preeti Dabral 3 years ago

The transfer of electrons in our bodies is the cause of charging a body. When a charged body comes into contact with another charged body, it can induce charge. The movement of electrons from one location to another can generate a charge, resulting in a charge on the body.

ANSWER

Ray reflection by concave mirrors

Posted by Harshith Mn 3 years ago

CBSE > Class 10 > Science

1 answers

Preeti Dabral 3 years ago

A concave mirror has a reflective surface that is curved inward and away from the light source. Concave mirrors reflect light inward to one focal point. Unlike convex mirrors, the image formed by a concave mirror shows different image types depending on the distance between the object and the mirror.

ANSWER

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