A plant's response to an external stimulus involves receptors. A receptor that responds to light normally contains
A. an end product of a metabolic pathway.
B. a pigment component.
C. a transduction pathway.
D. a series of relay proteins.
Answer: B
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Phagocytosis (Phagotrophy) is:
A. attack of cells by bacteriophages B. the phases through which cells pass during division C. the disintegration of a cell D. the attachment of protist cells to a substrate E. the capture of food particles by a cell
All cells have a plasma membrane, cytoplasm, and ribosomes.
A. True B. False
Adding phosphorus to an aquatic ecosystem can result in a(n) __________ that clouds water and threatens other
aquatic species. Fill in the blank(s) with the appropriate word(s).
A college campus — including the students, birds, trees, sidewalks, and air — makes up one complete ________
A) community B) ecosystem C) population D) organism