After eating half of a banana as a snack, you decide to save the rest for later. There are two types of plastic wrap in your house, and you use one to cover the banana. In an hour, you return and find that your banana half has browned significantly despite being saved in plastic wrap. You discover that one of the plastic wraps is made of polyvinyl, and the other is made of polyethylene.
Which plastic wrap could have caused this browning effect, and why?
(1 point)
Responses
The polyvinyl wrap probably caused the browning since it traps ethylene gas which would speed up the ripening process.
The polyvinyl wrap probably caused the browning since it traps ethylene gas which would speed up the ripening process.
The polyethylene wrap probably caused the browning since it contains ethylene which would speed up the ripening process.
The polyethylene wrap probably caused the browning since it contains ethylene which would speed up the ripening process.
The polyethylene wrap probably caused the browning since it contains ethylene which would delay the ripening process.
The polyethylene wrap probably caused the browning since it contains ethylene which would delay the ripening process.
The polyvinyl wrap probably caused the browning since it traps ethylene gas which would delay the ripening process.
9 answers
The correct response is:
The polyvinyl wrap probably caused the browning since it traps ethylene gas which would speed up the ripening process.
This is because polyvinyl wrap can trap ethylene gas released by fruits, which accelerates the ripening process and can lead to browning in fruits like bananas. Polyethylene wrap, on the other hand, is less effective at trapping ethylene and is often used to help delay ripening.
The true statement is:
Abscisic acid regulates water loss in plants by making plants close their stomata during hot weather.
Abscisic acid (ABA) is a plant hormone that plays a crucial role in regulating water loss, particularly during stressful conditions such as drought or high temperatures. It signals the closure of stomata, which helps to reduce water loss through transpiration.
The independent variable of this investigation would be:
the concentrations of ethylene spray.
The independent variable is what you manipulate in an experiment to observe its effect on the dependent variable, which in this case would be the ripening of the bananas.
The correct response is:
It builds up on the side of the stem that is away from the light source and stimulates growth.
Auxin is a plant hormone that promotes cell elongation. When light is detected, auxin redistributes itself to the shaded side of the plant, causing the cells on that side to elongate more than those on the side facing the light. This differential growth causes the plant to bend towards the light source, a phenomenon known as phototropism.
Negative phototropism is the growth of a plant away from light. Positive phototropism is the growth of a plant toward light.
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