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kotegsom [21]
3 years ago
10

What percent of mammals are placental?

Biology
2 answers:
LuckyWell [14K]3 years ago
6 0

Answer:

Looking across the world, 99.9 percent of modern mammals are placentals and marsupials

Explanation:

harkovskaia [24]3 years ago
3 0

Answer:

nearly 94%

Explanation:

5,080 species out of 5,416 are placental

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madreJ [45]

Answer:

can be mutualistic or antagonistic.

Explanation:

According to the given information, the bacterial species <em>Staphylococcus aureus </em>present in some nasal passages and on the skin do not harm the person. The ecological interaction wherein both organisms are benefited and none is harmed is known as mutualism. Here, <em>Staphylococcus aureus</em> does not cause any disease in human when present on the skin and in the nasal passage, that is both are in mutualism.

However, when present in the bloodstream, the same bacterial species can cause infections such as sepsis and represents antagonist effects on the host.  

Hence, the <em>staphylococcus aureus </em>species may be mutualistic or antagonistic to human.  

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3 years ago
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Tatiana [17]

Answer:

yes, over time pieces of an animals life cycle can change and adapt to help them survive in different environments that doesn't happen overnight. In a frogs life cycle they develop into a frog from an egg. frogs have adapted to become what they are today and if I where to make a prediction it would be that frogs at one point lived solely in water based on the way they grow and develop in there life cycle. having a life cycle means there's room for improvement and tiny adjustments can be Made as a defense mechanism that develops over the course of many froggy life cycles.

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3 years ago
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Science can answer many questions for example the speed of light, the frequency of pitch or sound, dna tests
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How can changes In one part of a food web affect another part?
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