The corporation Bayer produces an herbicide called Liberty and the LibertyLink soybean, a genetically modified soybean that is resistant to this herbicide. The genetic modification allows soybeans to produce a protein that is able to destroy the Liberty herbicide. Thus, when a farmer sprays the Liberty herbicide on a weed-infested field of LibertyLink soybeans, only susceptible weeds, and not the farmer's soybean crop, die. One weed that farmers would like to get rid of is dodder (Cuscuta pentagona) a plant that uses chemical cues to find other plants such as soybeans. When a soybean plant is found, dodder wraps its leafless stems around the soybean and uses modified roots to tap into the soybean's vascular system. Because of the physical connection between a soybean plant and dodder, scientists hypothesized that dodder could obtain substances from the soybean plant other than nutrients, sugar, and water. They predicted that dodder would be able to gain the protein that destroys the Liberty herbicide. They tested this hypothesis by growing dodder on LibertyLinksoybeans and then applying the Liberty herbicide to see if the dodder would die. Their results are displayed in the table.
$\begin{array}{|c|}
\hline \text { Concentration of Herbicide }(\mathrm{g} / \mathrm{L})\
\begin{array}{l|l|l|l|l}
\hline \text { Treatment } & 0 & 0.36 & 0.72 & 3.6 \
\hline \text { Dodder on LibertyLink } & & & & \
\text { soybean } & \text { Survived } & \text { Survived } & \text { Survived } & \text { Died } \
\hline \begin{array}{l}
\text { Dodder on normal } \
\text { soybean }
\end{array} & \text { Survived } & \text { Died } & \text { Died } & \text { Died } \
\hline
\end{array}
\end{array}$ Source: Adapted from Jiang, L., Qu, F., Li, Z., & Doohan, D. (2013). Inter‐species protein trafficking endows dodder (Cuscuta pentagona) with a host‐specific herbicide‐tolerant trait. New Phytologist, 198(4), 1017-1022.
-With respect to translocation of sugars, a rapidly growing dodder plant is a ________ and the soybean plant is a ________.

Question

The corporation Bayer produces an herbicide called Liberty and the LibertyLink soybean, a genetically modified soybean that is resistant to this herbicide. The genetic modification allows soybeans to produce a protein that is able to destroy the Liberty herbicide. Thus, when a farmer sprays the Liberty herbicide on a weed-infested field of LibertyLink soybeans, only susceptible weeds, and not the farmer's soybean crop, die. One weed that farmers would like to get rid of is dodder (Cuscuta pentagona) a plant that uses chemical cues to find other plants such as soybeans. When a soybean plant is found, dodder wraps its leafless stems around the soybean and uses modified roots to tap into the soybean's vascular system. Because of the physical connection between a soybean plant and dodder, scientists hypothesized that dodder could obtain substances from the soybean plant other than nutrients, sugar, and water. They predicted that dodder would be able to gain the protein that destroys the Liberty herbicide. They tested this hypothesis by growing dodder on LibertyLinksoybeans and then applying the Liberty herbicide to see if the dodder would die. Their results are displayed in the table.
 $\begin{array}{|c|}
\hline  \text { Concentration of Herbicide }(\mathrm{g} / \mathrm{L})\
\begin{array}{l|l|l|l|l}
\hline \text { Treatment } & 0 & 0.36 & 0.72 & 3.6 \
\hline \text { Dodder on LibertyLink } & & & & \
\text { soybean } & \text { Survived } & \text { Survived } & \text { Survived } & \text { Died } \
\hline \begin{array}{l}
\text { Dodder on normal } \
\text { soybean }
\end{array} & \text { Survived } & \text { Died } & \text { Died } & \text { Died } \
\hline
\end{array}
\end{array}$ Source: Adapted from Jiang, L., Qu, F., Li, Z., & Doohan, D. (2013). Inter‐species protein trafficking endows dodder (Cuscuta pentagona) with a host‐specific herbicide‐tolerant trait. New Phytologist, 198(4), 1017-1022.
-With respect to translocation of sugars, a rapidly growing dodder plant is a ________ and the soybean plant is a ________.

Quizplus · Accepted Answer

In the context of plant biology, a "source" is an organ that produces or releases sugars (via photosynthesis), while a "sink" is an organ or plant that consumes or stores sugars. A rapidly growing dodder plant does not perform photosynthesis and relies on the soybean plant for nutrients, making the dodder a "sink" and the soybean plant a "source".

The Corporation Bayer Produces an Herbicide Called Liberty and the LibertyLink