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  • Part I External Stimulus - Plants - Sisd - Sisd

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7.13AB: External and Internal Stimuli Organisms and Environments Using the Web Surfing Science websites your teacher has assigned to you, complete the following online treasure hunt. Part I: External.

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How to fill out the Part I External Stimulus - Plants - SISD - Sisd online

Filling out the Part I External Stimulus - Plants - SISD - Sisd form online can be a straightforward process when you follow the right steps. This guide will walk you through each section of the form, ensuring you provide the necessary information accurately and efficiently.

Follow the steps to complete the form effectively.

  1. Press the ‘Get Form’ button to retrieve the form and open it in your browser.
  2. Begin by viewing the assigned ‘Cool Corn Phototropism’ movie. Answer the questions related to the plant’s response to the light source presented in the center of the planting area. Provide a detailed observation based on what you have seen.
  3. Next, assess how the plants reacted to the more diffuse room lights. Make a note of your observations.
  4. Identify the type of tropism associated with the single light source stimulus and jot down your answer.
  5. Determine the form of tropism that corresponds with the diffuse light source and record your findings.
  6. Watch the ‘Corn Root Gravitropism’ video and describe the events that transpire throughout the footage.
  7. Identify the external stimulus that influences the root's growth direction as depicted in the video. Document your insights.
  8. View the ‘Sunflower Gravitropism’ video next and describe the actions observed.
  9. Finally, characterize the external stimulus causing the observed growth patterns in the plants shown in the video.
  10. Once all sections are completed, save your changes, and utilize the options available to download, print, or share the completed form.

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Some common plant stimuli include light, gravity, water, movement of the sun, and touch. The naming of the tropism is associated with the stimulus. For example, the movement of plant roots towards water is called hydrotropism.

Plants are sensitive to stimuli from the environment (e.g., wind, rain, contact, pricking, wounding). They usually respond to such stimuli by metabolic or morphogenetic changes.

Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.

An external stimulus is the one which the organism receives from its external environment. An internal stimulus is the one which arises within the body. The external stimulus includes touch and pain, vision, smell, taste, sound, and balance.

Plants do not have a central nervous system with nerve receptors; however, plants will receive external stimuli information that is transmitted by chemical messengers (hormones) that can invoke a response. For example, plants will detect a light source through special cells called phototropins.

Examples of stimuli and their responses: You are hungry so you eat some food. A rabbit gets scared so it runs away. You are cold so you put on a jacket. A dog is hot so lies in the shade. It starts raining so you take out an umbrella.

The external stimulus includes touch and pain, vision, smell, taste, sound, and balance (equilibrium). These sensory stimuli are activated by external changes. Pain and touch: Pain is the stimulus that can cause a major response from the body.

External stimuli are factors outside of the body that are taken in by receptors and will lead to a response. Examples of external stimuli include temperature changes, vision, hearing, tasting, smelling, and even sunlight for plants.

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© Copyright 1997-2025
airSlate Legal Forms, Inc.
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Form Packages
Adoption
Bankruptcy
Contractors
Divorce
Home Sales
Employment
Identity Theft
Incorporation
Landlord Tenant
Living Trust
Name Change
Personal Planning
Small Business
Wills & Estates
Packages A-Z
Form Categories
Affidavits
Bankruptcy
Bill of Sale
Corporate - LLC
Divorce
Employment
Identity Theft
Internet Technology
Landlord Tenant
Living Wills
Name Change
Power of Attorney
Real Estate
Small Estates
Wills
All Forms
Forms A-Z
Form Library
Customer Service
Terms of Service
Privacy Notice
Legal Hub
Content Takedown Policy
Bug Bounty Program
About Us
Blog
Affiliates
Contact Us
Delete My Account
Site Map
Industries
Forms in Spanish
Localized Forms
State-specific Forms
Forms Kit
Legal Guides
Real Estate Handbook
All Guides
Prepared for You
Notarize
Incorporation services
Our Customers
For Consumers
For Small Business
For Attorneys
Our Sites
US Legal Forms
USLegal
FormsPass
pdfFiller
signNow
airSlate WorkFlow
DocHub
Instapage
Social Media
Call us now toll free:
+1 833 426 79 33
As seen in:
  • USA Today logo picture
  • CBC News logo picture
  • LA Times logo picture
  • The Washington Post logo picture
  • AP logo picture
  • Forbes logo picture
© Copyright 1997-2025
airSlate Legal Forms, Inc.
3720 Flowood Dr, Flowood, Mississippi 39232