EVERYDAY SCIENCE

Detailed explanation-1: -Gymnosperms. The term gymnosperm (“naked seeds”) represents four extant divisions of vascular plants whose ovules (seeds) are exposed on the surface of cone scales. The cone-bearing gymnosperms are among the largest and oldest living organisms in the world.

Detailed explanation-2: -Gymnosperms. These seed plants do not have flowers or fruit-their seeds are held in cones.

Detailed explanation-3: -Female Cones – the megasporophylls form a cluster and are called as the female strobili or cones. They bear the ovules having the megasporangium. Thus produces the haploid megaspores and a megaspore mother cell. The megaspore mother cell undergoes meiotic division produces four megaspores.

Detailed explanation-4: -Angiosperms and gymnosperms are the two major groups of vascular seed plants.

Detailed explanation-5: -Conifers like the spruce, cedar and pine tree are gymnosperms and have seeds on cones. Most coniferous trees are evergreen and are specially adapted to survive in areas with lots of snow.