Response+to+stimuli+(maintains+homeostais)

__Group Members:__
Shannon Kearns Liza Peressini Carly Etzin Sydney Rush

**__Team Effort:__** __**Illustration: Liza**__ __**Captions: Carly**__ __**Slides Made by: Shannon**__

1. 10% Salt and water mixture
2. Purple Onion

Purple onion
__**Materials( Sydney)**__: 1) Purple Onion Skin 2) 10 mg of salt mixed with distilled water 3) Unknown Substance A 4) Unknown Substance B 5) Unknown Substance C 6) Microscope Slides 7) Microscope 8) Distilled water 9)Dropper

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1. Look at unknown substance A, C, and onion through medium power, on the microscope and record observations. ( Make wet mounds on the microscope slide by adding two drops of water to the unknown substances. )=====
 * Unknown substance B should be viewed under low power.

===__Definition of Response to Stimuli (Carly)-__ A response to stimuli is usually the response of an organism to some external condition or event. Stimuli is the energy that causes a sensation; this cause has an effect - the response. ===

on, or condition that accelerates an physiological activity or response.
Purple Onion. Medium Power 100x Unknown Substance A with two drops of distilled water. Medium power



100x 100x

Photos cropped and uploaded by Carly.
===__Conclusion (Sydney):__ The hypothesis is correct. The hypothesis states, If the onion reacts to the salt than the known substances A, B, and C will react to the salt. All of the unknown known substances changed after the salt was applied.===