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B
Dryopteris
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C
Cycas
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D
Both a nad c
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Solution
The correct option is D Both a nad c The groups are: Pinus-type; Pseudotsuga-type; Tsuga-type; Cupressus-type; Texas-type; Araucaria-type, and Cycas-type. The phylogenetic relationships of various taxa of gymnosperms are discussed on the basis of these different kinds of transfusion tissue.