A student sets up an investigation by placing a plastic bag over a plant. She secures the plastic bag so that it is completely sealed and nothing can enter. She observes the plant daily to see if it remains green and healthy.
Which TWO questions is this investigation, as described, designed to answer?
a
Can the plant perform photosynthesis without a large supply of carbon dioxide?
b
Can the plant perform photosynthesis faster than a plant that is not sealed?
c
Can the plant perform respiration faster than a plant that is not sealed?
d
Can the plant perform respiration without a large supply of oxygen?
e
Can the plant perform photosynthesis without a large supply of oxygen?
f
Can the plant perform respiration without a large supply of carbon dioxide?
b
Can the plant perform photosynthesis faster than a plant that is not sealed?
e
Can the plant perform photosynthesis without a large supply of oxygen?
The investigation, as described, is designed to answer the following two questions:
a) Can the plant perform photosynthesis without a large supply of carbon dioxide?
e) Can the plant perform photosynthesis without a large supply of oxygen?
The investigation described is designed to answer the following two questions:
a) Can the plant perform photosynthesis without a large supply of carbon dioxide?
To answer this question, the student is observing the plant to determine if it remains green and healthy even when the plastic bag prevents fresh carbon dioxide from entering. If the plant continues to thrive, it would suggest that it can perform photosynthesis with a limited supply of carbon dioxide.
d) Can the plant perform respiration without a large supply of oxygen?
Respiration is the process by which organisms release energy from food (glucose) using oxygen. By sealing the plant in a plastic bag, the student is testing if the plant can continue to perform respiration without a large supply of oxygen. If the plant stays healthy and does not show signs of wilting or decay, it would imply that it is capable of performing respiration with a limited supply of oxygen.