This roundworm produces non-flagellated sperm, though these sperm cells are amoeboid, meaning that they move by extending and retracting protrusions.
The male erection and ejaculatory reflex require multiple physiological processes to work together in an incredible coordinated manner.
Human reproduction is perhaps the quintessential example of teleology in biology.
Critics laughed, and he removed it from later editions, but Charles Darwin privately continued to believe that whales evolved from a “race of bears.”
If someone suggests that a coherent, interdependent system of systems arose by chance, they’ll need to back that up with a detailed engineering analysis.