/sci/ - Science & Math

What are the chances that if alien life exist on different planets, they are similar to our own flora and fauna?

Are some features universal, due to the laws of physics or convergent evolution, regardless of which planet they evolved on? ie: alien organisms that need sight for survival will usually develop eyes that would be functionally and structurally similar to various eye types we can find on our own planet?
Obviously, it's possible to use echolocation, rely on a sense of smell, or not need eyes at all due to living underground or caves, but considering that most animals and even plants do have eyes or at least photoreceptors points toward the logical conclusion that sight greatly improves the chances of survival. Well, more like input and information of the environment to be precise, but let's move on.

So, with that, can it be said that if we visited a different planet and there was life on it, it would be logical to expect to find organisms that are remarkably similar to our own?