Life Science: Sustainability of Ecosystems

12 images of some birds such as seagulls, puffins, ducks and Canada Geese that live on or around freshwater or saltwater habitats

4 images of some birds such as emus and penguins that have less developed or small wings and have evolved over time not to be able to fly

4 images of some birds that are heavy-bodied and ground feeders such as turkeys, pheasants and peacocks

12 images of some cold-blooded animals such as frogs and newts classified as amphibians that can live in the water or on land

11 images of some animals such as lizards and Arctic Hares whose appearance has adapted to provide protection in their environments

20 images of animal pairs such as polar bears, turtle, dogs and birds in their juvenile and adult stages of life

10 images of some animals such as bears, bats, turtles and lemurs that spend the cold weather in a dormant state

Heavy metal is a term for some toxic chemical elements. They can cause problems like bioaccumulation, but are useful in nuclear medicine and medical imaging.