Fossilization so rare because it takes such a long time.
Water, proteins, and ions as well as waste such as co2. It is often a straw color and it makes up about 50-60% of the total blood volume
Answer:
Option D, It is highly efficient, as oxygen-rich air enters the lungs even while a bird is exhaling
Explanation:
In the respiratory system of birds, air flows only in one direction due to which a bird is capable to take in oxygen even when it is exhaling. The air sacs allow only unidirectional flow of air, which is more fresh and contains high oxygen content. Even a bird’s lung are capable to store and pump air, when they are at stationary position.
Hence, option D is correct.
Which of the following best describes how nutrients get from the small intestine to other tissues in the body? Well normally by blood they collect then transfer to other parts of the body just like blood carries OxygenIf that tells you what one
One advantage of using enzymes in industrial manufacturing processes would be that each enzyme works specifically for a certain reaction. So, you can expect that no other reactions can occur. Hope this helps. Have a nice day. Feel free to ask more questions.