These are examples of homologous structures. Homologous structures are similar because they are inherited from a common ancestor, they are examples of organs or structures that appears in different animals, underlining anatomical commonalities which is evident that they have a common ancestor. Analogous structures on the other hand are structures that are similar in unrelated organs.
The correct answer is option D, that is, Jon is correct because the respiratory system removes waste from the body by ridding it of carbon dioxide when we exhale, and the digestive system removes waste from the body in the large intestine where the waste is sent and removed through the rectum.
The respiratory system functions to provide adequate oxygen for the proper functioning of the body and at the same time works to remove the waste products like carbon dioxide via the process of exhalation.
On the other hand, the function of the digestive system is digestion and absorption. It digests the food components into smaller pieces, and helps in the absorption of nutrients from the food, the leftover undigested food, or waste is excreted out through the rectum. Hence, both respiratory and digestive system exhibits one common function of excretion of waste materials.
The 8 most common elements in Earth’s crust are:
46.6% Oxygen (O)
27.7% Silicon (Si)
8.1% Aluminum (Al)
5.0% Iron (Fe)
3.6% Calcium (Ca)
2.8% Sodium (Na)
2.6% Potassium (K)
<span>2.1% Magnesium (Mg)
</span>ヽ( º ᗜ º )ﾉ*\( º ᗜ º )/
Pour each into a separate container and heat them both up to 100 degrees Celcius. The one that boils is water.
