In flatworms, the action of ciliated __________
draws interstitial fluid into a system of tubes that
delivers it to the body surface. Fill in the blank(s) with the appropriate word(s).
Answer: flame cells
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When S. aureus infects the body, which cells will produce the antigen receptors that will recognize the polysaccharides in the cell wall of S. aureus?
a. B cells b. Macrophages c. Memory T cells d. T cells e. Mast cells
Describe the difference between incomplete penetrance and variable expressivity. It is often difficult to pinpoint the cause of incomplete penetrance or variable expressivity. What possible interactions may be responsible?
What will be an ideal response?
A measure of how efficiently a person can function both physically and mentally is called
A. fitness. B. health. C. BMI. D. SDA.
In a grassland of Kansas, 1,000 grams of grass are produced per square meter per year by all the different grass species. A theoretical upper limit to the biomass of secondary consumers that can be supported in this ecosystem is
A) 1,000 grams. B) 100 grams. C) 10 grams. D) 0.1 gram. E) 1 gram.