Answer:
Option (B)
Explanation:
For an organism to get preserve and form fossil, the organism must be comprised of a hard part and they should be immediately buried by the sediments after their death. The body of the organism must be detached from the oxygenated environment so that the body does not get damaged.
Mudflats usually refers to the coastal wetland areas that are commonly formed in the inter-tidal zone. They are also considered as the tidal flats. These mudflats are comprised of fine sediments that are carried from other places and are rich in organic matter and there is low or absence of oxygen. This helps in the preservation of fossils.
For example, clams with calcite shells that lived on the mudflat are most likely to be preserved in geological history.
Hence, the correct answer is option (B).
Answer:
subtropical high pressure
Explanation:
Many desert areas are caused by subtropical high pressures. Such areas are consistently warm, dry and also sunny. And are the Arabian desert in the middle east and in Africa, the Sahara desert. It is also called the horse latitude and have it's latitudes between 30 and 35 degree in the north and south. Rainfall is supposed and winds is variable with calm winds sometimes.
The fossil range can simply be defined as the time period in which an organism has existed, thus left fossil traces of its existence. The fossil range can be very short, medium, or long, thus usually there are limitations before certain type of organism evolves into another species, thus eliminating the ancestral organism from the fossil records. On the other hand, there are organisms that have incredibly big fossil ranges of several hundred million years, and since they emerged, they have remained almost unchanged. Those kind of fossil ranges are very rare though, and they don't represent the general picture. Most of the fossil ranges are between several thousand years and several million years, as that is usually how much a species exists, ending its reign, be it because of competition, changes in the environment, or big natural disaster.
These two theories are related because they are continuity from one another. The theory of plate tectonics insinuates that the crust layer is broken into multiple pieces, this is caused by the pressure of the mantle layer, which managed to break the crust where it is thinner. The theory of continental drift insinuates that the tectonic plates move around the Earth because of the pressure from the hot semi-liquid mantle layer.
