Several things could cause it. A decrease in any predator that feeds on mice will cause an increase in mice population because less of them will be eaten by other animals. An increase in the mice food supply could cause an increase in population too, especially if lack of food was the main limiting factor of the mice population. In very rare circumstances, additional mice could be brought in from other parts of the world by humans. There are some non-native fish living in lakes because someone put some in there and they started to breed.
population, or habitat constrictions
Will be higher seasons when more food is available
What chemical might cause the yeast population to enter the death phase?
there would be less nutrients for the plant.
Which factor might determine whether the frequency of the new allele will increase in a population where a mutation occurs?
Any cause that reduces reproductive success in a proportion of a population, potentially exerts evolutionary pressure or selection pressure. So if a habitat changes such that certain traits lead to more or less offspring the population as a whole will have an increase in the frequency of the trait that leads to having more offspring.
population, or habitat constrictions
It might increase if humans do not kill them
population, or habitat constrictions
Will be higher seasons when more food is available
What chemical might cause the yeast population to enter the death phase?
This depends on the organisms habitat and the surroundings of the habitat, for example a zoo habitat is well cared for and safe. A rainforest habitat can be in grave danger because of the large population of human beings on the earth. Every habitat is different.
if there is too less population then the natural population will increase and there might be an end to the human population.
Availability of food.
there would be less nutrients for the plant.
If the population do not or can not conform to the normalities of that society.
If by people, then the animals might be hunted or lose their habitat. Loss of habitat causes include deforestation and forest fires. For plants, they might be demanded too much.