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Q.
Characters of both conifers and cycads are found in
Chhattisgarh PMTChhattisgarh PMT 2009
Solution:
Ginkgo shows resemblance with both Cycadales and Coniferales. Resemblances between Ginkgo and Cycadales are- well-developed nucellar beak and pollen chamber, haustorial nature of pollen tube, multiflagellated spermatozoids large egg massive female gametophyte with well-developed venter, endoscopic embryo with two cotyledons, hypogeal seed germination. Resemblance with Coniferales are- cone like appearance, long and dwarf shoots, pycnoxylic wood, uniseriate medullary rays, longitudinal dehiscence of microsporangia and sessile ovule etc.