The oxygen is drawn through the nose into the mouth by muscles in the throat. Because of this type of breathing, lungless salamanders will drown if in water for a long period of time. Determining luster involves considering the brilliance of the surface, and estimating its ability to reflect light. A mammal that, in the female of the species, has an external pouch into which incompletely developed young climb to nurse and finish developing. The texture of groups or masses of minerals is said to be massive when the mineral is poorly crystallized and dense, and without apparent internal structure.
Massive minerals are compact and individual grains are microscopic.
Flint is an example of a massive mineral. The changing of a body's form and appearance. This is usually from a larval stage to adult. Examples of metamorphosis, or transformation, are caterpillars to butterflies and tadpoles to frogs. They have adapted their lifestyle to eat garbage, pet food, and garden plants as well as destroying property.