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$ The entire material world which can be...

$ The entire material world which can be seen and detected with instrument is like microscops and telescope is called universe.
! Living organisms are unevenly distributed in the biosphere

A

If both As and R are correct and R is correct explanation of As

B

If both As and R are correct but R is not correct explanation of As

C

If As is correct, R is wrong

D

If both As and R are wrong.

Text Solution

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The correct Answer is:
B
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According to Thomson's model, every atom consists of a positively charged sphere of radius 10^(-10)m in which entire mass and positive charge of the atom are uniformly distributed. Inside the sphere, electrons are embedded like seeds in a watermelon. According Rutherford, entire positive charge and mass of the atom are concentrated in a tiny central core of the atom, which is called atomic nucleus. Size of nucleus ~~10^(-15)m . The nucleus contains proton and neutrons. Negatively charged electrons revolve around the nucleus in circular orbits. The size of atom is of the order of

According to Thomson's model, every atom consists of a positively charged sphere of radius 10^(-10)m in which entire mass and positive charge of the atom are uniformly distributed. Inside the sphere, electrons are embedded like seeds in a watermelon. According Rutherford, entire positive charge and mass of the atom are concentrated in a tiny central core of the atom, which is called atomic nucleus. Size of nucleus ~~10^(-15)m . The nucleus contains proton and neutrons. Negatively charged electrons revolve around the nucleus in circular orbits. The size of atomic nucleus is of the order of

According to Thomson's model, every atom consists of a positively charged sphere of radius 10^(-10)m in which entire mass and positive charge of the atom are uniformly distributed. Inside the sphere, electrons are embedded like seeds in a watermelon. According Rutherford, entire positive charge and mass of the atom are concentrated in a tiny central core of the atom, which is called atomic nucleus. Size of nucleus ~~10^(-15)m . The nucleus contains proton and neutrons. Negatively charged electrons revolve around the nucleus in circular orbits. Large angle scattering of alpha -particle could not be explained by

The activities of man had adverse effects on all forms of living organisms in the biosphere. Unlimited exploitation of nature by man disturbed the delicate ecological balance between the living and non-living components of the biosphere. The unfavourable conditions created by man himself threatened the survival not only of him but also of the entire living organisms on the mother earth. One of your classmates is an active member of 'Eco club' of your school which is creating environmental awareness amongst the school students, spreading the same in the society and also working hard for preventing environmental degradation of the surroundings. Which of the following does NOT exist in a balanced ecosystem?

DINESH PUBLICATION-ENVIRONMENTAL ISSUES-Assertion and reason
  1. $ Mitochondria are called "Food-Factories" of a plant cell. A plant ...

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  2. $ Life on earth originated by interaction of the various chemical subs...

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  3. $ The entire material world which can be seen and detected with instru...

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  4. $ solar system has 15 planets. ! Earth is the major member of the so...

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  5. $ The approximate distance between the sun and the Earth is about 148....

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  6. $ living organisms can exist alone ! A population is a group of orga...

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  7. $ Nucleus was discovered by Robert Brown ! Large sized organisms hav...

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  8. $ A cell with actively dividing nucleus is called interphase cell. !...

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  9. $ Hormones are the secretions to all theory. ! During mitosis the nu...

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  10. $ Viruses are not an exception to all theory ! During mitosis the nu...

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  11. $ Cellular totipotency means that single cell can give rise to a fully...

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  12. $ Flow of genetic information is through the DNA of the nucleus . ! ...

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  13. $ Endoplasmic reticulum also acts as the cell-skelton. ! Flagellum o...

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  14. $ Acetabularia is the largest sized single called green algra. ! PPL...

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  15. $ Cyanobacterial cells are eukaryotic ! Prokaryotic cells are diplo...

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  16. $ Protoplasm is the physical basis of a cell. ! Angstrom is a unit ...

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  17. $ All the living and non living matter is formed of molecules. ! Mo...

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  18. $ Minerals such as carbonates and phosphates acts as buffers. ! Biom...

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  19. $ ATP is a type of coenzyme. ! Adenine is a type of pyrimidine.

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  20. $ Ergosterol is a lipid that changes to vitamins D on activation by UV...

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