Does the location and general biodiversity of tropical rain forests and boreal forests agree with what you would predict according to the latitudinal gradient pattern?

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.

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

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