What ecological roles do burrowing polychaetes play in the marine environment?
What will be an ideal response?
Many burrowing polychaetes are deposit feeders and actively pass sediments through their bodies during their feeding and digging activities. This leads to oxygenation and regeneration of the sediments.
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Which of the following is common to both extracellular and intracellular digestion?
A. the ability to phagocytose food particles B. a slow speed of digestion C. the presence of a digestive cavity D. the ability to consume both large and small food items E. None of these characteristics are common to both extra- and intracellular digestion.
Primary productivity on land is affected by _____
a. nutrient availability c. temperature b. amount of sunlight d. all of these
Which of the following is NOT an effect of
cortisol?
a. causes liver cells to hydrolyze glucagon b. suppresses the uptake of glucose by body cells c. suppresses the hydrolsis of fats by adipose cells d. causes skeletal muscle cells to degrade proteins e. more than one of these is NOT an effect of cortisol
________ reactions release energy when electrons are removed from a substance
Fill in the blank with correct word.