Primary succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and other organisms usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited. In other words, it is the gradual growth of an ecosystem over a longer period.[1][2]
In contrast, secondary succession occurs on substrate that previously supported vegetation before an ecological disturbance from smaller things like floods, hurricanes, tornadoes, and fires which destroyed the plant life.[3]
A 2nd and 3rd degree will leave a scar because they both damage your tissue and nerves. you can tell if its a 2nd degree if its red and hurts a lot and your skin is blistering red and you can tell its a 3rd degree burn if it doesn't hurt much at all or there's no pain at all and you feel no pain because the nerves are damaged :)
Brown eyes, blue eyes, green eyes. the gene is the [eye color] and the differing genes create multiple alleles, the varying colors.
The hydrosphere is the combined mass of water found on, under, and above the surface of [the earth.] ⦁ The word comes from the Greek words for "water" and "sphere." ⦁ The hydrosphere includes water in liquid and frozen forms in groundwater, oceans, lakes and streams
