Penguins and mangroves have adapted to survive in their environments. Penguins huddle together to conserve heat in Antarctica's cold climate, while mangrove trees' roots extend above ground to breathe when tides submerge the wet soil they grow in. Neither penguins nor mangroves can physically change, but mangroves can collect salt in their leaves. While some penguin species migrate, mangrove trees disperse seeds that grow into new trees.