the Neomorph, does it have a repeating life cycle?

I don't believe there is any acidic blood in the neomorph. I didn't get the impression it burned or sizzled on the floor when Oram shoots it and david certainly didn't get splashed with any Im sure. think RS has gone for a more natural and organic creature in the neomorph

I'm not sure but David 8's lab didn't look melted and he was a neomorph butcher in there.

hahaha he was a butcher of all species mate, 'if it bleeds, I will dissect it' hahaha

but ur right, there was no sign of acid burns. though I think bishop covers this in aliens. I know aliens hasn't happened yet but surely as RS has seen it, it may be a small addition to answer this. after bishop examines the facehugger he tells ripley something about after the creatures death something neutrolizes the acid. though david doesn't have any original xenos in his lab, yet the facehugger should be acidic. I think once it had been dead for some time the acid would have dissipated and would not be harmfull maybe?

ali81, I'm pretty sure Ash said that too about the facehugger's blood neutralizing upon death. As to the acid burns, in the novelization, David 8 had a xenomorph in his lab too on display.

If the neomorph biology is similar to the facehugger/xenomorph, then the neomorph blood could have been neutralized by the time David 8 began dissecting.

I guess David 8 may blow on their nose, then play cards with the neomorph and xenomorph until they die in a couple of days...then he cuts them up.

hahahaha couple of games of scabby queen perhaps?

I think a lot of you are overthinking the Trilobite and Deacon. If you remember in Prometheus, when David had the drop of pathogen on his finger, there were tiny organisms moving around inside. These organisms either destroy someone, mutate them, or infect a part of them that could be used to impregnate another life form to spawn a hybrid. In Prometheus, this was Holloway's seman, in Covenant, these were the Motes. However, in Prometheus, the infected seman took a detour into Shaw's uterus and was grown and incubated, becoming a large, squid-like creature: Merely a larger form of the tiny pathogen creatures. This then "facehugs" an Engineer and spawns an Engineer Neomorph, which we as a fan base have affectionately nicknamed the "Deacon." In Covenant, these tiny pathogen creatures mutate a local plant form to create an airborn shocktroop infection called the Motes; a much more effective transmission system. These infect a human being (accounting for the difference from the Engineer creature or "Deacon") and create a more human like monster nicknamed a "Neomorph" by the production crew. 

David, then, takes the tiny creatures, as he explains to Oram, that he saw on his finger, and experiments on them again, growing and mutating them, once again using Shaws reproductive system, however this time, he Engineers them, instead of natural wild growth, and is able to create a more orderly form in a stronger body than the natural Trilobite, which we now call a Facehugger. Additionally, David's drawings on the Covenant blu-ray confirm this, as we see a drawing of a monsters head that is just like the Deacon, and a monster head just like the Neomorph. He describes these as two variants of the same creature. 

great post 426 though if u will allow me a moment just to query a couple of things. I didn't see anything in the dollop of goo on davids finger though that doesn't mean u wrong. but ur saying that tiny, exact copies of the trilobite are in the goo and the trilobite is just a larger version? so what is the wasp looking chappy in AC that david is talking about? also the pathogen is manufactured to attack fauna, not flora. no plant life is affected by it by design. if plants were to be affected, then all the trees would have been as well. my theory is that it is a sponge or fungi that is infected that is later disturbed by the crew of the covenant but others believe its an egg sac created by the organisms within the goo. its all been left pretty open to interpretation here I think.

No I'm saying those little buggers infected Holloway's sperm and THAT is what became the Trilobite. It's very possible that there were insectlike spores inside those egg sacs already and the black pathogen simply mutated them for its own purposes:  To recode and impregnate. Does that answer your questions 

Yes I now see that I misspoke. The squid creature Trilobite is a larger version of Holloways incubated sperm with Shaw's eggs. 

yes makes sense holloways sperm would have been mutated which then, once it had travelled up the uterus, would then use one of her eggs to produce the trilobite.

Yes, and David then inadvertently recreated this process, but made it better/more efficient