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Birth and death.

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What are the 2 factors that keep the planets in orbit?

The two factors that keep planets in orbit are gravity and the forward motion they gained during their formation. Gravity pulls the planet towards the sun, but the forward motion prevents the planet from falling into the sun, leading to a stable orbit.


What two processes keep carbon dioxide stable?

respiration and photosynthesis


What two weather factors are most important in determining the plant and animal populations that can exist in an area?

The two most important weather factors in determining the plant and animal populations that can exist in an area are climate and rainfall. These factors will determine what food sources will be available in the area as well.


What are the two factors that affect speciation?

The two factors that affect speciation are isolation, which can be geographic or reproductive, and genetic divergence, where populations accumulate genetic differences that prevent interbreeding. These factors can lead to the formation of new species over time.


When is speciation is complete?

When the two populations can no longer interbreed.


What is the border across which genes can flow between two populations called?

The border across which genes can flow between two populations is called a "gene flow barrier." This barrier can be physical, such as a mountain range or river, or it can be due to behavioral or ecological factors that limit gene exchange between populations.


Which two processes keep the concentration of CO2 in the atmosphere stable?

Photosynthesis in plants absorbs CO2 from the atmosphere, while respiration from animals and decomposition of organic matter releases it back. These two processes work in balance to keep the concentration of CO2 relatively stable in the atmosphere.


Was your population of snow shoe hares and lynx stable or unstable?

The populations of snowshoe hares and lynx are generally considered to be unstable due to their cyclical nature. These two species exhibit a predator-prey relationship, where hare populations increase, leading to a rise in lynx numbers as they have more food. However, as the hare population eventually declines due to overpredation or environmental factors, lynx numbers also decrease, resulting in significant fluctuations in both populations over time. This dynamic cycle can lead to periods of boom and bust, reflecting the instability of their populations.


Community can contain two populations of the same species?

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