An exposure to sarin or sarin like chemical will caused the sarcoplasmic reticulum to be continuously stimulated by the continual electrical signal. This will open the calcium channels and allows the calcium ions to bind continuously with troponin. Sarin is an organophosphorus chemical which is highly poisonous. It is used as a chemical weapon of destruction.
The answer would be a because the jet stream is very cold and come down to the water like a magnet sort of and keeps the top of the water cold so there for you have a cold water current on the top of the water so the answer is )A
Fossils are mostly found in sedimentary rocks
Convection currents occur in definitely the mantle, not sure about other layers but not the inner core or crust. They are circular in movement
If organisms a and b both possess wings and are the only extant organisms that possess wings, then we can hypothesise that the current generation of flight organisms are the descendants of a, b, or both a and b, and that the wing trait first originated in these two organisms.
Since the trait for flight first evolved in a and b, it must have been carried forward into the future generations of species that must have evolved by various evolutionary processes like speciation, acting on a and b.
