Evolution says that all life forms are related.
I have 2nd, 3rd and 4th cousins and if you go back further, my more distant cousins include everyone on earth.
In EXACTLY the same way, all animals are related to us if you go back even further, so are plants and bacteria. There is no difference in the relations except how far back in time you trace the ancestors.
Little changes creep in over time. We can easily see the physical differences between Chinese and Europeans. If you go back further, the differences are even greater and you have apes, monkeys, dogs, mice, worms and eventually plants.
Everything else is just details.