Scientists study how substances move through a plant. They remove a ring of tissue from the stem. This takes away some of the transport vessels located around the stem’s outer edge. Several days later, they observe swelling above the section where the tissue was removed. What is the cause of the swelling?
- APhloem vessels have been removed and sucrose cannot move to the sink.
- BPhloem vessels have been removed and sucrose cannot move to the source.
- CXylem vessels have been removed and minerals cannot move to the sink.
- DXylem vessels have been removed and minerals cannot move to the source.