What was the significant about the rocks darwin found in the mountains

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

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