They are genetically and reproductively isolated. For the mule the specific isolation mechanism is termed as "Hybrid Inviability", where the postzygotic isolating mechanism prevents the hybrid from passing on their genes. A zygote may form with the sperm and egg, but the embryo will dies after a few cell divisions. The genetic information from male and female parents is insufficient to carry the organism through morphogenesis. *There are rare documented cases of a mule producing a viable offspring.
A desert biome, because since it can store water it wouldn't need a lot of water to survive, and deserts don't have very much rainfall.
Answer:
Preformed vitamin A is found in foods from animal sources, including dairy products, eggs, fish, and organ meats [1,2]. Provitamin A carotenoids are plant pigments that the body converts into vitamin A in the intestine [1,3].
Answer:
DNA polymerase is limited by the fact that:
1. it cannot add nucleotides in a 3' to 5' direction
2. it cannot initiate synthesis on its own.
Explanation:
ATP, which is created by mitochondria, (Not just mitochondria but its a good example) ADP lacks Phosphate, doesn't have enough power to transfer into adenosine triphosphate.
