Mutations

Is a sufficient number of mutations accumulated over time to create the mind-blowing diveristiy and complexity of today?Could random and rare mutations create the following:a second stomach in a cowecholocationlimbs from finsfully functional lungsbrains from single-celled organismsvertebratesvenus fly trapswingsfeathers (the perfect design of feathers would have to come immediately- crude feathers would cause the death of the animal and the loss of the mutation)nervous systems (these would also have to come about in one massive and miraculous mutation- half a nervous system is not good)senses for detecting the magnetic field of the planet (again, half a sense is no good- we're not talking about quantum leaps and enormous mutations that somehow work perfectly and create fully functional senses, limbs, organs, etc.)flowers that attract pollenators and attach "pollen packs" to the pollenator (again, some systems, like that of the orchid, are extremely complex- half a pollenation system would cause the extinction of the specie)mosquitos and chemicals that numb surrounding skin (mosquitos that were unable to numb the pain caused by their bite would become quickly extinct- what mutation could bring around a random mechanism that would just happen to produce a chemical that would just happen to numb an organisms skin.fingernailsetc.Please don't tell me that these questions needn't an answer because evolution occurred, no matter how you turn it. Occam's razor states that a theory that cannot produce sufficient answers for all questions is most likely incorrect. If evolution can only carry half its weight, then less likely and less possible theories must be condsidered, in the case that they are the only solutions.