Describe the various functions of tube feet
What will be an ideal response?
Functions of the tube feet include locomotion, food handling (prying open bivalves), and increasing surface area for the diffusion of respiratory gases and ammonia between the water-vascular system and sea water.
You might also like to view...
Long-term, heavy drinking can lead to ___________________, or scarring of the liver
Fill in the blank(s) with correct word
Why should a woman who plans to become pregnant notify her health care provider of any medications she is taking?
What will be an ideal response?
Oxygen levels in the photic zone fluctuate over the course of a 24-hr period. If you were measuring dissolved oxygen over the course of the day, when would you expect to see the lowest levels of oxygen and why?
A. Early evening -- when animals come to feed and disturb the surface waters. B. Mid-afternoon -- because the activity of the Calvin cycle (the dark reactions) of photosynthesis are at their peak. C. Early afternoon -- when the surface water warms up and sinks to the bottom. D. Mid-morning -- because fish are most active and their respiration rates are highest. E. During the night -- because the light reactions of photosynthesis are inactive.
The difference between the observed outcome and the corresponding point on the regression line for a given observation is a:
A. residual. B. heteroskedasticity. C. mean squared error. D. regression line prediction.