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What would be the decrease in population a year if no children were born?
Without births, the population decrease would be the same as the number of deaths, which is generally between 57-58 million a year.
Does the population size increase or decrease at higher trophic levels in the pyramid of numbers of an ecosystem consisting of any herbivores and birds feeding on the insects?
Population sizes decrease at higher trophic levels. If they increased the insects population would decrease meaning there would be less food available for the birds so their population size would then decrease. Look at the relationships between predator and prey species for more information
What type of hypothesis for the effects would change in the ozone layer have on Antarctican's penguins population?
A hypothesis could be: "A decrease in the ozone layer leads to increased ultraviolet radiation exposure in Antarctica, which negatively impacts the food sources of penguins, ultimately reducing their population size."
What might happen if the population of hawks in ecosystem grows very large?
there would be less nutrients for the plant.
What would happen if a worm and a mushroom were absent from a forest?
Some organisms population would decrease
How would a decrease in natality change the population?
A decrease in the birth rate will cause a decrease in population over time.
What change to this food chain would most likely result from a decrease in the mouse population?
decrease the number of hawks
What environmental factor could change a shrews population?
More predators so the population would decrease :(
How can people change the population of earth before it gets to full?
go into war. that way the world population would decrease
What will happen if the plankton population decrease?
The population of zoo plankton would decrease.
How can a dam affect the population of salmon?
it would decrease population
A population of an animal would decrease because of what?
A population of an animal would decrease because of animal testing. 3/5 people agree.
What would most likely decrease the genetic variations in the human population?
Which would most likely decrease the genetic variation in the human population?
Which would likely decrease the genetic variation in the human population?
If the human population was reduced to a very small number of interbreeding individual then this small population, denied outbreeding, would have very little genetic variation. Humans, who went through a bottleneck event about 70,000 years ago, are considered a " small " species because they have little genetic variation in comparison to many other species. Google cheetah to see how this concept works.
What population would decrease if all the grasshoppers died?
The grasshopper population.
What population would decrease if all grasshoppers died?
The grasshopper population.
What would be the decrease in population a year if no children were born?
Without births, the population decrease would be the same as the number of deaths, which is generally between 57-58 million a year.
