Fish are animals that live in water and breathe through their gills. Gills are like underwater lungs. They have scaly skin that helps them to move through the water and fins that help them swim.

What types of animals have been to space ... Small insects such as mosquitoes don’t fly, but rather swim through the air, so in turbulence they’re tossed all over. In rain most of them ...

Many species of multicellular organisms differ greatly from each other with respect to the types of developmental ... ones that gave rise to plants and animals, occurred deep in the past ...

While mutualism is highly complex, it can be roughly broken down into two types of relationship. In some cases ... A slippery substance at the rim causes these animals to fall into the digestive ...