★ Breath Quiz
What capacity of the lungs depends on the normal functioning of the perfusion, number of alveoli, thickness of alveolar-capillary membrane:
A. ventilation-perfusion ratio
B. pulmonary perfusion
C. diffusion capacity
D. lung compliance
E. lung elasticity
Select your answer:
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ADVBIO Genetics › View
Which describes why the twins shown are not exactly alike?
A. Mutations occured to change traits
B. Epigenetic changes were caused by environmental factors
C. The twins have different DNA
D. The twins are identical.
Biotechnology: Tools & Techniques › View
What role does heating play in PCR?
A. It separates the two DNA strands
B. It binds primers to the DNA
C. It elongates the DNA strand
D. It cuts the DNA