When the quadriceps contract, what also must happen at the same time? . a. the gastrocnemius must contract.. b. the gastrocnemius must relax.. c. the hamstrings must contract.. d. the hamstrings must relax.

What is the most common blood type in the u.s.?

George’s daughter was born with a hole in her heart. he met up with a group of individuals of questionable character who agreed to deliver to george a healthy heart that could be a transplant for his daughter for a sum of $20,000. the group george negotiated with failed to deliver the heart. george tried to sue when he did not receive the heart but was surprised when the courts would not enforce the agreement.can george force performance of this contract? why or why not? (10 points)will he be able to recover the $20,000 that he gave for the heart? why or why not? (10 points)

Which is the lipid molecule that controls what types of molecules can pass though?