The number of taxa exhibiting asexual reproduction is drastically reduced in higher plants (angiosperms) and higher animals ( vertebrates ) as compared with lower groups of plants and animals. Analyse the possible reasons for this situation.

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Solution

Each taxonomic category of hierarchy referred to as a unit of classification represents a rank and is commonly termed as a taxon. The number of similar characters of categories from lowest rank (species) to the highest rank (Kingdom).
Reproduction is the biological process by which new offsprings are produced by their parents. In asexual reproduction, an individual can reproduce without involvement with another individual of that species. This occurs in lower organisms that reproduce faster. This type of reproduction produces genetically-identical organisms whereas, in sexual reproduction, the genetic material of two individuals combines to produce offspring that are genetically different from their parents.

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Q. Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution?
(i) Lower groups of organisms have simpler body design.
(ii) Asexual reproduction is common in lower groups.
(iii) Asexual reproduction is common in higher groups of organisms.
(iv) The high incidence of sexual reproduction in angiosperms and vertebrates.

Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution?
i Lower groups of organisms have a simpler body design
ii Asexual reproduction is common in lower groups
iii Asexual reproduction is common in higher groups of organisms
iv The high incidence of sexual reproduction in angiosperms and vertebrates
Choose the correct answer from the options given below:
(a) i, ii and iii (b) i,iii and iv
(c) i,ii and iv (d) ii, iii and iv

The possible reason for evolution of reflex action in higher animals is:

In majority of higher animals and plants, ___ and ___ are mutually exclusive events.

Q. Higher plants differ from animals in

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