Their bones have not yet matured and are still somewhat soft and porous. As a result, there can be seepage of bone marrow through the soft bone and into the surrounding meat. When a young chicken is deep chilled, frozen ice crystals form inside the bone.
LAN Base is a powerful license for layer 2 access switches. Its broad range of access features covers all LAN Lite capabilities plus more robust features such as VTPv3 and FlexLinks. VTP version 3 offers better administrative control over VLAN topology information sharing to reduce unintended or disruptive changes.
As I understand it, LAN Base contains the most basic L2 features, IP Base contains L2 features including basic routing (static routes, eigrp stub etc) and IP Services is the full enterprise feature set. This Cisco blog explains it in better detail.