Plant Responses

• What is the main focus of this video lesson?

  Investigating light or gravity effects on seedlings
• What is the independent variable in the light intensity experiment?

  Light intensity
• What is the dependent variable in the light intensity experiment?

  Height of the seedlings
• What is a control variable in the experiment?

  Volume of water
• How many mustard seeds are placed in each dish?

  10 mustard seeds
• Why is it important to have the same number of seedlings in each dish?

  To ensure a fair comparison
• What should you do if one dish has more seedlings than the others?

  Remove seedlings to equalize numbers
• How should the height of each seedling be measured?

  Hold the stems straight without damaging
• Where should one dish be placed for full sunlight?

  On a very bright windowsill
• What is phototropism?

  Growth towards the light source
• What happens to auxin in seedlings when exposed to light?

  It concentrates on the side away from light
• What is the effect of keeping seedlings in the dark?

  They grow rapidly trying to reach light
• What happens to the leaves of seedlings grown in the dark?

  They become small and yellow
• Why do seedlings in the dark have small and yellow leaves?

  They cannot photosynthesize without light
• How does gravity affect the growth direction of seedlings?

  Chutes grow upwards, roots downwards
• What role does auxin play in root growth?

  It inhibits cell growth on the lower side
• What is the purpose of the required practical in this lesson?

  To investigate light and gravity effects
• How do the results of the light intensity experiment typically compare?

  Height is similar in full and partial light
• What should be done with the results after the experiment?

  Calculate mean seedling height and draw diagrams
• Where can students find questions related to this practical?

  In the vision workbook
• What is the significance of auxin in plant growth?

  It controls growth direction in response to stimuli
• Why is it important to control variables in experiments?

  To ensure valid and reliable results
• What is the role of chlorophyll in plants?

  It absorbs light energy for photosynthesis
• What conditions are necessary for seed germination?

  Warmth, moisture, and suitable light
• Why is accurate data recording important in experiments?

  It allows for proper analysis and conclusions
• How do environmental conditions affect plant growth?

  They influence growth rates and health