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The common ancestor for cycads and angiosperms is
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Important Questions on Plant Kingdom
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In which of the following books, characters of evolutionary importance were not considered while classifying plants?
A) Species plantarum
B) Families of flowering plants
C) Genera plantarum
D) Die Naturlichen Pflanzenfamilien
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Read the following combinations and arrange the below chronologically in the light of evolution.
i) Vascular Cryptogams - Ramenta
ii) Embryophytic non-archegoniate phanerogams - the presence of companion cells in the phloem
iii) Plant amphibians - elaters
iv) Tracheophytic archegoniate phanerogams - no vessels in the xylem
The correct sequence is
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Numerical taxonomy is related to all, except
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(a) In gymnosperms and angiosperms, male and female gametophytes do not have an independent free-living existence.
(b) In bryophytes and pteridophytes, male and female gametophytes have an independent free-living existence.
(c) Viruses are non-cellular organisms that are characterised by having an inert crystalline structure outside the living host cell.
(d) Generally, plant viruses are single-stranded DNA viruses.
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(A) Numerical taxonomy gives equal importance to each character.
(B) Cytotaxonomy is based on cytological information like chromosome number, structure and behaviour.
(C) At present phylogenetic classification systems, which are based on the evolutionary relationship between the various organisms are most accepted.
(D) Artificial classifications are based on a few characteristics.
How many of the above statement(s) is/are not correct?
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