Conditions necessary for photosynthesis practice exercise 2

Course: Grade 9 Integrated Science - Living things and their environment - Nutrition in plants

Quiz Questions (40 questions)

Question 1
In a controlled experiment, a plant is kept in darkness for 48 hours and then tested for starch. No starch is found. Which condition was missing?
Question 2
In a controlled experiment, a plant is kept in darkness for 48 hours and then tested for starch. No starch is found. Which condition was missing?  (1 mark)
Question 3
In a controlled experiment, a plant is kept in darkness for 48 hours and then tested for starch. No starch is found. Which condition was missing?  (1 mark)
Question 4
In a controlled experiment, a plant is kept in darkness for 48 hours and then tested for starch. No starch is found. Which condition was missing?  (1 mark)
Question 5
Refer to the image below showing a starch test on a variegated leaf. Why does starch appear only in the green parts after iodine testing?
Question 6
Refer to the image below showing a starch test on a variegated leaf. Why does starch appear only in the green parts after iodine testing?  (1 mark)
Question 7
Refer to the image below showing a starch test on a variegated leaf. Why does starch appear only in the green parts after iodine testing?  (1 mark)
Question 8
Refer to the image below showing a starch test on a variegated leaf. Why does starch appear only in the green parts after iodine testing?  (1 mark)
Question 9
Refer to the image below. Which labeled factor represents a condition necessary for photosynthesis?
Question 10
Refer to the image below. Which labeled factor represents a condition necessary for photosynthesis?  (1 mark)
Question 11
Refer to the image below. Which labeled factor represents a condition necessary for photosynthesis?  (1 mark)
Question 12
Refer to the image below. Which labeled factor represents a condition necessary for photosynthesis?  (1 mark)
Question 13
Refer to the image below. Which labeled factor represents a condition necessary for photosynthesis?  (1 mark)
Question 14
Which of the following is a condition necessary for photosynthesis to take place in plants?
Question 15
Which of the following is a condition necessary for photosynthesis to take place in plants?  (1 mark)
Question 16
Which of the following is a condition necessary for photosynthesis to take place in plants?  (1 mark)
Question 17
Which of the following is a condition necessary for photosynthesis to take place in plants?  (1 mark)
Question 18
Which of the following must occur first for photosynthesis to begin efficiently in a leaf?
Question 19
Which of the following must occur first for photosynthesis to begin efficiently in a leaf?  (1 mark)
Question 20
Which of the following must occur first for photosynthesis to begin efficiently in a leaf?  (1 mark)
Question 21
Which of the following must occur first for photosynthesis to begin efficiently in a leaf?  (1 mark)
Question 22
Why does extreme soil pH inhibit photosynthesis despite adequate light and CO₂?
Question 23
Why does extreme soil pH inhibit photosynthesis despite adequate light and CO₂?  (1 mark)
Question 24
Why does extreme soil pH inhibit photosynthesis despite adequate light and CO₂?  (1 mark)
Question 25
Why is the opening and closing of stomata critical in regulating the rate of photosynthesis?
Question 26
Why is the opening and closing of stomata critical in regulating the rate of photosynthesis?  (1 mark)
Question 27
Why is the opening and closing of stomata critical in regulating the rate of photosynthesis?  (1 mark)
Question 28
Why is the opening and closing of stomata critical in regulating the rate of photosynthesis?  (1 mark)
Question 29
Why is water considered essential during photosynthesis?
Question 30
Why is water considered essential during photosynthesis?  (1 mark)
Question 31
Why is water considered essential during photosynthesis?  (1 mark)
Question 32
Why is water considered essential during photosynthesis?  (1 mark)
Question 33
Using the image provided, through which part of the leaf does carbon dioxide enter to aid in photosynthesis?
Question 34
Using the image provided below, through which part of the leaf does carbon dioxide enter to aid in photosynthesis?  (1 mark)
Question 35
Using the image provided below, through which part of the leaf does carbon dioxide enter to aid in photosynthesis?  (1 mark)
Question 36
Using the image provided below, through which part of the leaf does carbon dioxide enter to aid in photosynthesis?  (1 mark)
Question 37
Where do plants obtain the carbon dioxide needed for photosynthesis?
Question 38
Where do plants obtain the carbon dioxide needed for photosynthesis?  (1 mark)
Question 39
Where do plants obtain the carbon dioxide needed for photosynthesis?  (1 mark)
Question 40
Where do plants obtain the carbon dioxide needed for photosynthesis?  (1 mark)

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