Answer:
Scientific discoveries challenged long-held ideas. The discovery of penicillin lead to development of antibiodics to treat infection.
Explanation:
Because of the belief that helping behavior is motivated by self-interest, it led to claim that there is no such thing as true altruistic behavior.
<h3>What is a
helping behavior?</h3>
This refers to any voluntary actions that is intended to help the others with reward regarded or disregarded.
However, since people believed that helping behavior is motivated by self-interest, it led to belief of no such thing as true altruistic behavior.
Therefore, the Option B is correct.
Read more about altruistic behavior
<em>brainly.com/question/11287458</em>
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Earth can be considered as a closed system, since it only receives sunlight (energy), while the overall mass stays constant, without (almost) any exchange from space. Another example of a closed system is a saucepan or frying pan, on a stove, when its lid is closed.
Answer:
The natural barrier
Explanation:
If this is not a choice i did it so i could ace my math test to get sdome free answers. Just copying the guy above me.
I think it is population.
