It receives blood from the whole body. Blood from the lungs enters the heart through the pulmonary vein into the left atrium. ... - Has ventricles that has thicker walls thus more muscular than auricles generating higher pressure to pump blood over long distances.
Answer:
A) A mutation in a single gene can result in a defective protein.
Explanation:
This hypothesis states that one gene codes for one protein-enzyme, so consequently, if mutation occurs in that gene, the enzyme will not work properly. This hypothesis was very important for the fundamental discoveries of molecular biology, but it is oversimplified meaning that relationship between genes and proteins is much more complex.
Answer:
Fossil Evidence and Structural evidence proves to support the theory of evolution because fossil evidence shows how animals looked like a few hundreds to thousands of years ago, and structural evidence shows how an animal can change from a land creature to a sea creator such as a whale starting from Indohyus to becoming a whale as it is now.
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Explanation:
because fossil fuels take forever to be created hope this helps