Why would exercise immediately help blood circulation in your legs?
A. As muscles contract, they squeeze blood through the veins and increased heart rate pushes more blood into the legs.
B. Increased heart rate pushes more blood into the legs.
C. As muscles contract, they squeeze blood through the veins.
D. Exercise increases the amount of red blood cells.
E. Exercise increases the amount of red blood cells and increased heart rate pushes more blood into the legs.
A. As muscles contract, they squeeze blood through the veins and increased heart rate pushes more blood into the legs.
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A) lymph nodes B) tonsils C) RED BONE MARROW D) THYMUS GLAND E) spleen
Suppose a segment of DNA contains five restriction sites for a particular restriction enzyme. How many fragments of DNA will remain after the enzyme is used to cut the DNA?
A.) 4 B.) 5 C.) 6 D.) 10
Who demonstrated that DNA is the genetic material of the T2 phage?
A: Watson and Crick B: Meselson and Stahl C: Hershey and Chase D: Franklin E: Darwin and Wallace
All infections result in disease
Indicate whether the statement is true or false