what is anaphylaxis? (immunological disorders)
What will be an ideal response?
sudden fluid phase
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Natural killer cells destroy target cells by
a. releasing antibiotics, which breakdown the cell membrane. b. releasing perforin, which creates holes in the cell membrane. c. releasing histamine, which signals other blood cells to aggregate. d. releasing lysozyme, which breaks down the cell wall. e. releasing antibodies, which break down the cell wall.
What advantages does a complete digestive tract have over a blind-ended gastrovascular cavity?
What will be an ideal response?
The flow volume and temperature of a stream are unaffected by ____
a. oxygen content b. rainfall c. snowmelt d. shade cast by plants e. altitude
Suppose a small population of deer is introduced to an island. All of the original males have 6 to 10 points on their antlers, and the average male has 8 points
After several generations, if most males have antlers with 10 points and no males have 6 points, the population has undergone ________ selection. Fill in the blank(s) with correct word