I see that it's time for me to be 'that guy' yet again but at bargain basement level we have a genetic connection with every living thing - all life on earth is as one; the only thing is difference of genetic closeness, so to speak.
If you intuitively understand the concept of being closer to your mum than your second cousin, you've got the basics already.
From a human p.o.v. it's about 50% similarity with a banana, for example. Otherwise it's a larger or a smaller number, that's all.