In gymnosperms, their reproductive structures include the pollen cones, which produce pollen grains or the male gametophyte; and the seed cones, which produce female gametophyte.
<em><u>Why? Well, the cones spread from the male cones to the female cones... Then, the female cones put this sticky stuff on the cone called, " Ovule" Finally, it creates the cycle once again.</u></em>
Astrocytes are the most numerous cell type within the central nervous system (CNS) and they perform a myriad of tasks ranging from axon guidance and synaptic support, to the control of the blood brain barrier and blood flow.
