Answer:
many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
Explanation:
Answer:
Dear Ms. Sandy Walters I am very impressed, happy, and greatful that you did this. I wouldn't expect any less from a great mind like you. Although we do not know eachother I do know one thing: Your work is inspiring.
Sincerely, hamborger69
Explanation:
Yeah it sucked I know but I hope it helps.
<span>According to a source the answer is B. They save energy and metabolites and help the organisms to respond to the environmental changes.
</span>A genotype is a set of genes in the human DNA responsible for different traits. It represents your complete identity that you will inherit from your parents and ancestors.
<span>On the other hand, a phenotype is how that trait expresses physically, a characteristic, a visible description of your physical features, including height, eye color, overall health, history of diseases, the ability to gain or lose weight fast, what type of food you like, what you enjoy and what you hate. </span>
That easy..............<span>21 one is your technical answer according to todays rules but scientist used to think it was only 20 so 20 would be your answer</span>
