Darwin observed that members of a population vary in their functional, physical, and behavioral characteristics. there is a cons
tant struggle for survival of organisms. organisms in a normal population differ in reproductive success. All of the choices are correct. None of the choices are correct.
Darwin observed that members of a population produced more offsprings which competed for depleting resources among themselves. Genetic varieties among organisms caused some organisms to be better adapted to survive as compared to other organisms in a population. These organisms were favoured by natural selection and they were able to reproduce and pass on their characteristics to their offsprings. The organisms with better characteristics has more reproductive success as compared to other organisms of the species.
It forms from sandstone that has come into contact with deeply buried magmas. Quartzite looks similar to its parent rock. The best way to tell quartzite from sandstone is to break the rocks. Sandstone will shatter into many individual grains of sand while quartzite will break across the grains.
