Biology

There may be a good scientific reason for this, but why is it impossible for life to develop on another planet based on anything other than carbon? For example, surely it would be possible to have a Tungsten based life form? Or, from an undiscovered element? Why do scientists say they can only be life on Mars if water once existed?✅ Answers ? Best Answer The major reason is because ALL life on earth (and therefore all life we know of) is absolutely dependent on water. While it is obviously theoretically possible for life to be non-water based, such life would have characteristics we cannot even begin to guess at, so we might not even recognise it if we were looking at it. So it is simplest to assume all life is water-based, and to base our searches off that. Another reason is because it is also a fairly safe assumption that all life is also carbon-based. Carbon chemistry is what provides the amazing complexity of organic compounds: it forms long-chain molecules, it can be charged (+ or -), it can be hydrophobic or hydrophilic, etc. All this complexity is an absolute requirement for the huge number of different molecules Read more

If only one of the mice in the same cage has scabs, it's one of 3 things - the scabs are from the 2 mice fighting, playing, fighting or grooming each other - or the scabs are from too much protein in the food. Some rats can handle it, others have a rash that causes them to itch and scab. If both rats had it then I'd say it was mites - but not when only one has it. What do you feed them? The protein level should be around 14%. Some lab blocks made by Purina and packaged as Mazuri have 24% - too high to be a staple of a rat's diet. The same goes for some dog foods. If you supplement the daily diet with plenty of fresh fish, poultry or meat, this can also cause this. The only other possibility would be an allergic reaction to the bedding. I had a mouse that couldn't handle poplar when using it for bedding and I had to buy him the very expensive Sanichip which was also made from poplar but he had no reaction or rash.