Give evidence to support the hypothesis that sieve-tube elements and companion cells are closely related developmentally.
Give evidence to support the hypothesis that sieve-tube elements and companion cells are closely related developmentally.
Describe the differences in structure and function of sieve tubes, sieve elements and companion cells.
Thought Questions: 1. Why are plant and animal cells considered more closely related than prokaryotic and eukaryotic cells? Give three reasons. 2. Although most cells have one nucleus, some have no nucleus while others have multiple nuclei. Name two cells (or cell types) that have no nucleus and two that are multi-nucleate. We were unable to transcribe this image