Gymnosperms Name the four subgroups within gymnosperms. How does the needle-like

Question

Gymnosperms Name the four subgroups within gymnosperms. How does the needle-like leaf benefit the conifer? Are pine cones haploid or diploid? Are male or female pine cones larger? Are microspores haploid or diploid? What process do microspores undergo to form pollen grains? Are megaspores haploid or diploid? What process do megaspores undergo to form the egg or ovule? Is the tissue surrounding the egg haploid or diploid? Once the egg is fertilized what structure will form? Are pine seeds haploid or diploid? How are pine seeds be dispersed through the environment? What cell division process do pine seeds undergo to create a new pine tree?

Explanation / Answer

1

i)Conifers, Cycades, Gingko and Gnetophytes are four subgroups within gymnosperm.

ii) Needle shape leaves get less damaged in snow, reduce transpiration, extend photosynthesis and help to withstand stress condition.

iii)Pine cones are diploid.

iv) Female pine cones are larger.

v) Microspore is haploid.

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