The "spiral staircase" structure of DNA is referred to as the ________.
A. twist of life
B. double helix
C. tertiary structure
D. spiral structure
Answer: B
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The atlas is one of the
A. thoracic vertebrae. B. sacral vertebrae. C. lumbar vertebrae. D. cervical vertebrae.
Describe the direction of sensory input and motor commands relative to the spinal cord
A) Both sensory input and motor commands travel toward the spinal cord. B) Both sensory input and motor commands travel away from the spinal cord. C) Sensory input travels toward the spinal cord and motor commands travel away from the spinal cord. D) Sensory input travels away from the spinal cord and motor commands travel toward the spinal cord.
Aged erythrocytes are phagocytized in the liver and spleen by cells called ________.
Fill in the blank(s) with the appropriate word(s).
The myometrium of the uterus is composed of
A. skeletal muscle. B. mucous membrane. C. fibrous connective tissue. D. loose connective tissue. E. smooth muscle.