The <u>small intestine</u> builds an important barrier against pathogens, but it has to absorb <u>nutrients</u> efficiently at the same time for optimum function.
<h3>What is a pathogen?</h3>
A pathogen refers to living microorganisms that are capable of causing diseases and harm to their host. Thus, they include the following:
Basically, the <u>small intestine</u> has the ability to build an important barrier against pathogens. However, it has to absorb <u>nutrients</u> efficiently at the same time for optimum function of an organism.
Read more on pathogens here: brainly.com/question/27961024
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<u>Answer:</u>
Comparing and contrasting embryos of different species is called Comparative embryology.
<u>Explanation:</u>
It is the branch of embryology where embryos of different specie are compared to find out that how two special are evolutionary similar or different from each other. It also helps in the identification of organism's closest ancestor. For example: When Aristotle observed embryos of different animal specie, he described that egg laying (oviparous) organisms are different from birth giving (viviparous) organisms. This has a connection with organism's developmental pattern which tell that both organisms have different or common ancestry.
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Answer:
physical property is the property that can be observed without the matter under experiment undergo permanent changes it is reversible