A student is experimenting with a substance that moves into the cell via facilitated diffusion. The student notes that as the concentration of the substance outside of the cell increases, the rate of movement of the substance into the cell increase and then plateaus. What explains the phenomenon seen by the student?

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.