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Birth and death rates determine whether a population is growing, shrinking, or staying constant. If more people are being born than dying, then it is growing. If more are dying than being born, then the population is shrinking.
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What is the study of influence changes in a population's size?
population dynamics-Population dynamics is the study of the factors that influence these changes in a population's size
The influence of genetic drift on allele frequencies increases as?
population size decreases
What factors influence how species evolve?
Everything that affects the demographics of a population, ranging from single mutations to environmental circumstances such as climatological change or the introduction of new predators.
What led Darwin to propose his theory of evolution?
Darwin observed that high birthrates and a shortage of life's necessities forced organisms into a constant "struggle for existence", both against the environment and against each other is which led Darwin to propose his theory of constitution
What factors influence the action of microbial agents?
The number of microbes and the nature of microbes in population. Other factors include the temperature and pH of the environment, the concentration of a agent, and the mode of action of a agent.
Demographers figure out population growth by comparing what?
the answer is by comparing birthrates and death rates
What do scientists use to predict population size?
There are several things that demographers use to predict how a population will grow. Some of them include gender balance, age, income levels and so much more.
How birthrates and death rates influence the size of a population?
Simple mathematics. If there are more births than deaths, the population will increase. If the reverse is true, the population decreases.
What is call when the birthrates are less than the death rates?
Population decreases
Why do population are getting many?
Contraseptives and exponential birthrates can be two reasons for overpopulation
What might be the consequences of falling birthrates in some European countries?
less population
What are the major factors affecting population change?
Current birthrates and increased longevity.
The astonishing growth in urban population between 1870 and 1900 was largely the product of?
rising birthrates
Refers to a shift in death rates followed by a shift in birthrates and its associated population boom?
The ice in the box
What is true of an industrial society?
birthrates drop, and may even drop low enough to reverse population growththere are fewer infant and child deathsThere are fewer infant and child deaths. Birthrates drop, and may even drop low enough to reverse population growth.
An isogen is a line connecting points of equal what?
birthrate
What factors explain why population in different countries at different rates?
Birthrates , death rates, women and male intercourse
