a dam is built that separates a river into two sections—a deep upstream section and a shallow downstream section. when the dam is first built, a fish species is able to move from the upstream section into the downstream section, but not vice versa. predators can more easily catch the fish in the shallow downstream section than they can in the deep upstream section. which scenario is most likely to lead to speciation?

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

what tree

explanation:

the combining form means bone marrow or spinal cord. meio- "meiosis" myco- "mycosis" myelo- "osteomyelitis or myelogram" myo- "myositis";

the answer is: myelo- "osteomyelitis or myelogram"

option d : from a warmer substance to a cooler substance

according to second law of thermodynamic, heat flows from higher to lower temperature region. heat is the transfer of energy from an object at higher temperature to an object at a lower temperature. so energy flows from warmer to colder objects.