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Chapter 140 -- Part 6: Population Growth
There is a large number of children who have yet to reach procreation age, which will lead to a larger population in the future.
Choice B has an even age distribution.
The population size will not change in the near future.
A population with a fairly even distribution is shown in Choice C, except for people in their 30s and 40s.
The group may have children in the future.
Choice D shows a large group of people in their 50s who did not have children.
There is a large group of people in their 30s who have not yet had a child.
The population will get smaller as shown in the graph.
Plants need nitrogen and phosphorus to grow.
Carbon and hydrogen are not harmful.
If the environment changes, the population has less chance of survival.
There can't be evolution without diversity.
There will be a lot of deadbacteria in the lake once it is killed.
The fish population is threatened by decomposition which uses up oxygen.
This change is brought about by human intervention.
There is no time for fish to acclimatize.
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