Right and Left Handed Snails?

(PhysOrg.com) -- Snail shells can spiral to the left (sinistral) or to the right (dextral), determined by a single gene. The effect of this difference has produced a separate distinct species. The most common snails are dextral, and sinistral are rare.

This is a common right spiraled dextral snail

 This is a rare left spiraled sinistral snail

 The majority of snails are dextral

Mating between sinistral and dextral snails is almost impossible because their genitals are on opposite sides of their body. The mating of the large Satsuma snails, for example, takes place face-to-face. All snails have both male and female reproductive organs, but when both snails are dextral or both are sinistral, everything lines up nicely. When one is dextral and the other sinistral the genitals line up male-male and female-female.

It has been determined that dextral snails came from sinistral snails, caused by a single recessive gene replacement. Dextral snails are far more common than sinistral snails, and therefore have more mating opportunities, so why does the sinistral survive? Survival of the fittest would surly cause them to become extinct. This and the difficulty in mating means sinistral snails should become extinct unless sinistrality has some advantage. Scientists in Japan and Taiwan have discovered the advantage may be a resistance to snake predation.

Southeast Asian snakes of the pareatidae family — oriental slug-eating snakes — specialize in eating slugs and snails, and because the majority of snails are dextral with the shells on the right side, the snakes attack from the left, grabbing the shell with its upper jaw and sticking its lower jaw into the gap. The snakes have also evolved (Notice the assumed evolution bias. This is simply a genetic variation or loss of information. It produces an exact mirror image, and is not evolution into something else.) asymmetrical mouth parts with more fangs on one side than the other to help them eat the dextral snails. (No, this is design when it was created) These changes (Excuse me there are no changes, this snake has always had these features. You show no evidence because there isn’t any), however, make it difficult for them to eat sinistral snails, especially as the snakes continue to attack from the left. (Then how come the snake hasn’t evolved this?)

Researchers led by Dr. Masaki Hoso of Tohoku University looked at the distribution of Satsuma snails and the slug-eating snake species in Japan, and discovered that in areas where the snakes are found, there are more sinistral Satsuma snails than elsewhere.

The team had predicted (Now this is science) that sinistral snails with larger shells such as Satsuma snails should also survive better than Bradybaena similaris snails, which have smaller shells, because they were more difficult for the snakes to handle.

To test their hypotheses the researchers kept sinistral and dextral snails of both species and exposed them to predation from slug-eating snakes. The results were that none of the dextral Satsuma snails escaped being eaten, but 87.5 percent of the sinistral snails survived. In the smaller snails the survival rate for sinistral snails was smaller but they had a huge advantage over dextral snails.

The results led Dr. Hoso to predict that at some point the protection from predation would outweigh the mating difficulties and the chirality, or direction in which the shell coils, would become fixed in the opposite direction and the two groups become separate species and evolve their separate ways (Wrong, both snails have a gene that can make them either). To test this idea, the researchers sequenced the DNA of all Satsuma snail species found in Japan and built a family tree to show their relationships. The tree demonstrated clearly that sinistral species have evolved (Micro-evolution or adaptation, not macro-evolution) from dextral snails at least six times, and that in at least four of these occasions the reversal was due to a change in a single gene.

(This falsifies survival of the fittest. According to scientists who believe in creation variations in genetic of individuals causes some to survive under any circumstances. This is not a cause of extinction. And evidence indicates most extinctions were caused by major worldwide cataclysms)

The reversal results in a massive advantage, because virtually overnight a group of snails is adapted to survive predation and is separated from other members of the species and can (Vary within the same kind!) evolve separately. Hoso said these events represent the “hopeful monster,” (Wrong again. The hopeful monster was when a bird hatched from a reptile egg. This can only happen by genetic engineering at Area 51) an idea put forward by geneticist Richard Goldschmidt (Proven wrong a long time ago. Now used as evolution propaganda), who said small genetic changes could result in large evolutionary change (Wrong, small changes do not change the kind of organism and it always reverts back to the original kind like Darwin’s Finches).

Read more at: https://phys.org/news/2010-12-snails-shells-left-survive-snake.html#jCp

When you such interesting discoveries they always insert their atheistic unscientific materialistic interpretation and miss the greatest truth. What is the meaning of all this? That a naturalistic process created amazing things? No, that there was a designer! And that all this was engineered to help the snails and snakes to survive in an evil world. The more you study design in nature the more improbable evolution becomes which supports the information given in the Bible.

Romans 1:20

 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse.