Which of the following is an internal framework of hard parts?
A. Endoskeleton
B. Vertebral column
C. Intervertebral disk
D. Hydrostatic skeleton
E. Exoskeleton
Answer: A
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All microorganisms require
A) carbon, iron, and sodium. B) phosphorus, aluminum, and sodium. C) calcium, potassium, and magnesium. D) phosphorus, selenium, and sulfur.
Compare the efficiency of mammalian lungs versus fish gills
What will be an ideal response?
The volume of air normally breathed in and out of the lungs in a single breath at rest is referred to as the
A. total volume. B. expiratory reserve volume. C. reserve volume. D. tidal volume. E. inspiratory reserve volume.
Which of the following is NOT a component of a tropical marine ecosystem?
A. All of the answers are components of a tropical marine ecosystem. B. sunlight C. algae D. corals E. fishes