Which of the following is a prediction based on the cell theory that all organisms are made of cells, and all cells come from preexisting cells? 1. if you boil nutrient broth and place it in an air-tight flask, cells will appear in the broth2. cells are produced only from pre-existing cells3. if you boil nutrient broth and place it in an air-tight flask, no cells will appear in the broth4. cells arise spontaneously from nonliving material

3. If you boil nutrient broth and place it in an air-tight flask, no cells will appear in the broth.

Explanation:

Prior to cell theory, theory of abiogenesis was considered as a valid theory of evolution and it was believed that living forms come from non living forms gradually. In the bank of river, if there are so many frogs then it was believed that the small stones beside the river bank gradually evolved to become frogs.

But the findings of Louis Pasteur's experiment in which he boiled nutrient broth in an air tight flask gave a big blow to the theory of abiogenesis and it was discarded. Louis Pasteur proved that when the nutrient broth is boiled which killed all the existing micro-organisms and placed in an air tight flask then no micro-organism i.e. cell appeared in the broth. It simply indicates that living forms i.e. cell can only appear from pre-existing cell not from abiotic matter like nutrient broth.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.