Members of the phylum ______ harbor a green alga that exists in a "precursor" state, having neither discernible nuclei nor mitochondria.
A) Ginkgophyta
B) Coniferophyta
C) Gnetophyta
D) Progymnospermophyta
E) Cycadophyta
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Q39: In pines, the mature male gametophyte consists
Q40: The tallest living plant is:
A)Sequoiadendron giganteum.
B)Sequoiadendron semperiverens.
C)Metasequoia.
D)Taxodium.
E)Pinus
Q41: All seed plants are heterosporous.
Q42: The Bennettitales is an extinct group of
Q43: A seed develops into an ovule.
Q45: In Pinus, the four-celled pollen grain consists
Q46: Each gymnosperm ovule usually produces several archegonia.
Q47: The tallest vascular plant belongs to the
Q48: Seeds are thought to have evolved before
Q49: In gymnosperms, the ovules abort about 95
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