Answer:
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Explanation:
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The principle which allowed Marta to find her dog Roxy is known as an: d. absolute threshold.
<h3>What is an
absolute threshold?</h3>
An absolute threshold can be defined as the smallest (lowest) level of stimulus such as light, touch, sound, etc., that can be detected by a living organism, usually half the time.
In this scenario, a principle which allowed Marta to find her dog Roxy amid all of the other barking dogs is known as an absolute threshold.
Read more on absolute threshold here: brainly.com/question/15301528
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I have the first 3 answers for you but I going to try to get the 4 answer for you
1. 39
2. 9
3. 62
A speices usaully can only breed with the same species unless it is done in a lab with their DNA and sometimes that doesnt work