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[A] : [A]: Parthenogenesis is a type of ...

[A] : [A]: Parthenogenesis is a type of sexual re- production. [R]: Because young ones develop without fer- tilization of egg

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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[A] : In Parthenogenesis , fertilized egg is stimulated to divide . [R] : It is a type of reproduction through which animals are not able to eliminate non adaptive characters and sterility.

[A]: Dolly, a sheep is an example of cloning. [R]: Cloning in another sense is sexual re- production.

[A]: Development in cockroach is termed as retrogressive metamorphosis . [R] : The young ones resemble adults in all essential respects .

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained. What is R.D.S. of pinacol-pinacolone rearrangement?

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A] : Tympanic membrane stretching across the aperture between skull ...

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  2. Assertion : Lateral line system is found in fishes and aquatic larval ...

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  3. [A] : [A]: Parthenogenesis is a type of sexual re- production. [R]: Be...

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  4. [A] : Our inner ear contains sense organs for balance movement of flu...

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  5. [A] : Hair cells on the basiiar membrane are responsible for hearing....

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  6. [A]: Thyroid stimulating hormone is smallest peptide hormone. [R]: ...

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  7. Assertion: Aldosterone is a steroid hormone and is important in the co...

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  8. [A] : Cortisol is a protein hormone that regu- lates gluconeogenesis ...

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  9. [A]: A tadpole whose thyroid gland has been removed does not metamorph...

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  10. [A]: The regulation of RBC production is ac complished by the hormone ...

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  11. [A] : Steroid hormones are similar to choles- terol in structure. [...

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  12. [A] : The hormone aldosterone is secreted by adrenal cortex after the ...

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  13. [A] : Prostaglandins are hormone like mol- ecules produced by many bod...

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  14. [A] : Placenta is a tissue in eutherian mam- mals that has both embryo...

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  15. [A] : Testes are attached to abdominal wall by a ligament and under te...

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  16. [A] : Emboly involves the invagination and involution. Enmbloy is ex...

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  17. [A] : In vertebrates, motor fibres to striped muscle. parasympathetic...

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  18. [A] : Keratin is one of a group of fibrous in- soluble proteins (scele...

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  19. [A] : Macrophage is a large amoeboid cell that can engulf, ingest and ...

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  20. [A] : Molecules of fatty acid, glycerol, sugars and amino acids are ab...

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