DENDROLOGY

DENDROLOGY AND SOCIETY

FAMILIES OF ANGIOSPERMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following explains the taxon relationship between Zea mays and Pinus?
A
Same order, different families
B
Same class, different orders
C
Same phylum, different class
D
Same kingdom, different phylum
Explanation: 

Detailed explanation-1: -The gymnosperms are subdivided into five Divisions, four of which, the Cycadophyta, Ginkgophyta, Gnetophyta, and Pinophyta (also known as Coniferophyta) are still in existence while the Pteridospermatophyta are now extinct.

Detailed explanation-2: -The sieve plates are present in sieve tube members of the angiosperms but it is absent in the sieve cells of gymnosperms.So the major difference between the phloem of angiosperms and gymnosperms is sieve tube.

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