The teeth of grain-eating animals (such as horses) are usually broad and ridged. this makes the teeth suitable for grinding and chewing. meat-eating animals (such as lions) have pointed teeth that are good for puncturing and ripping flesh. this illustrates:

This illustrates a result of natural selection pressure on them and the connection between form and function.

Explanation:

It is due to natural selection and adaption of species which allow the broad and ridged teeth for grain-eating animals like in horses and pointed teeth for flesh-eating animals.  

This natural selection and adaptation of species allow them to fit in their environment and survive. Natural selection favored the favorable traits which became more common over time in these organisms and allow their teeth to gain specific structure which perform a specific function. So their teeth form is structured according to the function they perform.

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explanation:

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prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.