Charles Darwin is most remembered today for his contribution to the theory of evolution through natural selection. The seeds of this theory were sown in Darwin’s mind through observations made during a five-year voyage across the New World on a ship called the Beagle. There he studied fossils and geological records, the geographical distribution of …
Not all scientists agree on what life is all about. There are several features that describe most living things. However, for most of the features listed below, we can think of one or more examples that might break the rule by classifying something that doesn’t live as alive or something that lives as non-living. Hence, …
In addition to the presence of chloroplasts, another major difference between plant and animal cells is the presence of a cell wall that surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress, and also allows cells to develop turgor pressure, which is the pressure of the …
Natural selection is the maintenance of a functional advantage that enables a species to compete better in the wild. Natural selection is the naturalistic equivalent of backyard breeding. Over the centuries, human breeders have dramatically changed the pet population by choosing individuals and removing unwanted properties over time. Similarly, natural selection gradually eliminates the species …
