Give the names of these gases. Answer: a. The chemical formula CH 4 indicates two types of atoms (C and H). A molecule of methane consists of 1 carbon atom and 4 hydrogen atoms. Similarly, SO 2 indicates two types of atoms (S and O). A molecule of sulfur dioxide consists of 1 sulfur atom and 2 oxygen atoms.
Mudskippers are a type of fish. They are part of a fish family known as tribe Periophthalmini), which is in the family, or type of, Gobiidae (Gobies). They are amphibious fish, which means that they can use their pectoral fins to walk on land.
One of the first four-legged creatures that walked on land moved like a fish known as a mudskipper, a study shows-dragging itself along on its forelimbs like crutches. The creature lived in floodplains on what is now Greenland during a period known geologically as the Devonian period-about 360 to 410 million years ago.nstead, the creature, known as Ichthyostega, would have hauled itself up on its front limbs like it was on crutches. Previously, scientists believed the creature would have walked like a salamander.The first 3D modelling of it showed that Earthâs first âwalkersâ were more like mudskipper fish than lizards.