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Population can decrease by a huge disease for example loads of people died from small pox. But such a disease is very uncommon as we have many vaccination's.
Also if nuclear war starts huge amounts of people will die.
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Wiki User
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Population density determined by?
population size and per unit of area population size and per unit of area
What happens when the death rate is higher than the birthrate?
population increases
This population pyramid might be considered?
Unusual because populations normally decrease with age
Which country's population was the closest to the world population in 1650?
the population in the world in the mid 1600's was almost nine hundred million and then it decrease by a lot and now we have a lot more people in the world.
How is population decrease bad?
Less work power, less money, a danger for country, culture and language to dissapear.
What are two factors that increase population size and two factors that decrease population size?
Increase: Survival and Immigration Decrease: Death and Emigration
What is a natural disaster that can have a significant impact on human population?
it will decrease population size
What is the population of milk is in the bowl?
Population decrease in bowl by every 3 second millimeter. Size bowl important to population loss. Population decrease in bowl by every 3 second millimeter. Size bowl important to population loss.
What are 2 ways that the size of a population can decrease?
By Genocide, and by war..
What is RNA gene drift?
gene drift is when a population experiences a decrease in variation and population size.
What is the factor most likely to result in a decrease in the size of a specific population is?
Famine
Does the population size increase or decrease at higher trophic levels in the pyramid of numbers of an ecosystem consisting of a tree insects (that are 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
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
A biotic or an abiotic resource in the environment that causes population size to decrease is a?
limiting factor
How can population decrease in size?
There are many different ways, such as dying out or being alone with no mate.
The size of a population can get larger with no influences from migration if birthrate or death rate .?
Increase; decrease
Why is it possible for a population with a high birth rate to decrease in size?
I dont think its possible for the population to decrease because if people keep on having babies the population is just going to grow larger than what it was before.
