¿Qué relación estructural existe entre el receptor celular y la señal o mensajero? ¿Cuál es la diferencia entre los mensajeros que tienen receptores de membrana y aquellos que tienen receptores intracelulares?

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

How can scientists use the fossil record to find evidence of relationships between different species?

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume