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On which plant did Hugo de Vries work du...

On which plant did Hugo de Vries work during his experimentations?

A

Vinca rosea

B

Oenothera lamarckiana

C

Mirabilis jalapa

D

Solanam nigrum

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Read the paragraph and answer the questions given below : Reproduction is the process by which the living Species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, Spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because. basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Answer the follolwing question. What are methods of reproduction in plants?

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Read the paragraph and answer the questions given below : Reproduction is the process by which the living Species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, Spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because. basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Answer the follolwing question. How do living species continue their existence?

Read the paragraph and answer the questions given below : Reproduction is the process by which the living Species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, Spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because. basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Answer the follolwing question. Why is regeneration not true method of reproduction?

Read the paragraph and answer the questions given below : Reproduction is the process by which the living Species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, Spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because. basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male. Answer the follolwing question. What is the modern method of reproduction aimed at in higher organisms?

Cellular respiration is the oxidation of foodstuffs for the production of energy. During aerobic respiration, complete oxidation of glucose takes place.Contradictor to this, glucose is incompletely oxidized durin anaerobic respiration . Many microbesare capacble of surviving anaerobically in environments that lack oxygen. Anaerobic respiration occurs via two steps,namely glycolysis and fermentation. The pyruvic acid formed during glycolysis is converted to organic acids or alcohols during anaerobic process. higher animals and plants, or seeds submerged in soil under water are capable ofperforming anaerobic respiration, when the oxygen levels are depleted .Even body cells like erythrocytes and mscle cells perform anaerobic respiration. Seeds sown in soid inmarshy lands having high water content would perform which type of cellular respiration during germination ?

CHETANA PUBLICATION-ORIGIN AND EVOLUTION OF LIFE -Exercise
  1. Mutation theory was proposed by which scientist?

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  2. Name of ship by which Darwin travelled during his famous voyages.

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  3. On which plant did Hugo de Vries work during his experimentations?

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  4. The struggle between the organisms of same species is called : ..........

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  5. ...................... is defined as a connecting link between amphibi...

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  6. ........... is a missing link between fish and amphibian.

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  7. Find the odd one out:....................

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  8. Find the odd one out ....................

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  9. Those organs which are structurally similar but functionally dissimila...

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  10. Those organs which are functionless are known as:

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  11. ................ is a vestigeal organ in man.

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  12. Find the odd one out..................

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  13. can be considered as connecting link between ape and man.

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  14. Which of the following primitive man was nicknamed as handy man?

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  15. The first fossil of Australopithecus was obtained from:..............

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  16. Dryopitheaus lives about 20 million years ago in : .........

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  17. Cranial capacity of Australopithecus is about...........

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  18. The cranial capacity of java ape man is about :...................

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  19. The cranial capacity of Homo habilis is about:.............

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  20. The Cranial capacity of Nanderthal man was

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