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motive
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observation
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reaction
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stimulus
The cue or combo of cues that produces a response is called a 
, which is a thing or event that causes a specific reaction in an organ or tissue.
True.
Soil retains water through pores, water has a high infiltration rate when going into granular soils but a very low infiltration rate when going into compact soils. For example, sandy soils that are often seen in Western Australia have very limited ability to retain water.
Answer:
The main components of the cytoplasm are cytosol (a gel-like substance), the organelles (the cell's internal sub-structures), and various cytoplasmic inclusions. The cytoplasm is about 80% water and usually colorless.
