Which of the following bases is not found in RNA?

A. adenine
B. guanine
C. thymine
D. cytosine
E. uracil


C

Biology & Microbiology

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The organ of the lymphatic system where T cells mature is the

A. spleen. B. thymus. C. tonsil. D. lymph node. E. heart.

Biology & Microbiology

Circulation in the accompanying diagram functions primarily as a(n) ____

a. an open circulatory system b. system consisting of mostly of tissue spaces c. closed circulatory system d. interstitial fluid system e. three-directional system

Biology & Microbiology

Social behavior in which both the "actor" and the "recipient" benefit is known as ________. [three words]

Fill in the blank(s) with correct word

Biology & Microbiology

Myosin and actin are the major contractile proteins in _______ muscle.

A. cardia B. smooth C. skeletal D. two of the above E. all of the above

Biology & Microbiology