________ surround the body as a rigid, exterior case, and are exhibited in arthropods.
Fill in the blank(s) with the appropriate word(s).
Exoskeletons
Exoskeletons surround the body as a rigid, exterior case, and are exhibited in arthropods.
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The three types of RNA involved in protein synthesis are mRNA, ________, and ________.
What will be an ideal response?
Which of the following results from the stimulation by nerve impulses generated in the respiratory center when they arrive at the muscles involved in inspiration?
A) contraction of the diaphragm B) reduction in the efficiency of oxygen transport by the blood C) increase in air pressure in the lungs D) opening of the trachea E) downward movement of the ribs
When a human embryo is implanted in the uterus, the embryo is in the morula stage. Indicate whether the statement is true or false
When a person straightens her arm, she is flexing the triceps brachii. During this movement, the triceps are referred to as the
A. tendon. B. antagonist. C. agonist. D. All of these. E. None of these.