Scientists study how substances move through a plant. They remove a ring of tissue from the stem by cutting it out. Taking away this tissue also takes away some of the transport vessels located around the stem’s outer edge. A few days later, they observe swelling above the region from which 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.