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$ The microfossils discovered in the ear...

$ The microfossils discovered in the earth's oldest fossil bearing rocks resemble the eubacterian and some photosynthetic cyano-bacteria.
! It indicates that the simple organisms are believed to be the ancestors of all the complex forms.

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:
A
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DINESH PUBLICATION ENGLISH-ENVIRONMENTAL ISSUES-Assertion and reason
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  2. $ Silver fish is found in the sea. ! Fish represents warm blooded an...

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  3. $ The microfossils discovered in the earth's oldest fossil bearing roc...

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  4. $ Exo-biology is a branch of biology. ! It deals with the study of e...

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  5. $ Mangrove plants grow in the deserts. ! These plants have symbiotic...

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  6. A: Leghaemoglobin is a compound of Iron and is present in the root nod...

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  7. A: Tap root system is that which arises from the radicle of seed. R:...

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  8. A: Temperature is an important factors for growth. R: High temperatu...

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  9. Assertion: In prokaryotes, there is present a ring shaped chromosome. ...

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  10. Assertion: The patients of cholera, vomiting and dysentery are given i...

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  11. $ Kingdom Monera includes the unicellular prokaryotic organisms. ! E...

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  12. A: The process of synthesis of complex organic molecules from simpler ...

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  13. Assertion: Euglena is an organisms with a controversial position in cl...

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  14. Assertion; An incomplete flower has all the four whorls. Reason; Pol...

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  15. $ Unicellular eukaryotes are the simplest organisms. ! Prokaryotes h...

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  16. $ Annual plants live for only one favourable season. ! Polycarpic pl...

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  17. A: The zygote develops into a multicellular organisms. R: Each cell ...

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  18. A: Pollination by insects is called self pollination. R: Cross polli...

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  19. A: The first step towards photosynthesis is reduction of CO2. R:ATP ...

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  20. $ Agamospermy is the process of Asexual reproduction. ! Asexual repr...

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