Why Has Natural Selection Favored the Evolution of Double Circulation

question 8

Multiple Choice

Why has natural selection favored the evolution of double circulation in birds and mammals?

• A)because they are larger than reptiles and amphibians
• B)because they use more energy than equivalent-size reptiles and amphibians
• C)because they have more viscous blood than reptiles and amphibians
• D)because they cannot obtain as much oxygen from the air as reptiles and amphibians

---

Definitions:

Superficial Puncture

A minor break in the skin, typically less deep, caused by a sharp object, barely penetrating the surface.

Blood Cultures

Laboratory tests performed on blood samples to detect the presence of bacteria or fungi in the bloodstream.

Silicone Serum Separator

A silicone serum separator is a component used in blood collection tubes that, upon centrifugation, forms a barrier between the serum and blood cells, facilitating sample processing.

Serum Studies

Research or diagnostic tests conducted on the serum component of blood, used to detect and quantify substances, such as hormones, antibodies, and drugs.