Answer1:Most fish have an organ called the SWIM bladder. It is a flexible, gas-filled sac located in the dorsal or top portion of the body cavity and helps to control the fish's buoyancy.

Answer2:Many insects can hover, or stay in one spot in the air, doing so by beating their wings rapidly. ... As the wings push down on the surrounding air, the result reaction force of the air on the wings force the insect up. The wings of most insects are evolved so that, during the upward stroke, the force on the wing is small.

Answer3:The major groups of living reptiles—the turtles (order Testudines), tuatara (order Rhynchocephalia [Sphenodontida]), lizards and SNAKES (order Squamata), and crocodiles (order Crocodylia, or Crocodilia)—account for over 8,700 species.

Answer4:They live on land, in the open ocean, and underground. With more than 5,400 species, MAMMALS move in all kinds of ways. They walk, hop, gallop, and swing from trees. They swim, dive, glide, and even fly!

Answer5:Antennae (singular: antenna), sometimes referred to as "feelers", are paired appendages used for sensing in arthropods. Antennae are connected to the first one or two segments of the arthropod head. ... Antennae can also locate other group members if the insect LIVES in a group, like the ant.

Answer6:Most amphibians live part of their lives underwater and part on land. Amphibians reproduce by laying eggs that do not have a soft skin, not a hard shell. Most females lay eggs in the water and the BABIES, called larvae or tadpoles, live in the water, using gills to breathe and finding food as fish do.