Muscular strength is the ability of the to exert force during an activity.

The number of living organisms in a particular area is

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?