7.7 - Xylem & Phloem Flashcards
Why plants need transport systems Functions and adaptations of xylem tissue Functions and adaptations of phloem tissue
1
Q
Why do plants need transport systems?
A
Multicellular low surface area to volume ratio diffusion too slow substances moved long distances
2
Q
What are the two main transport tissues in plants?
A
Xylem phloem
3
Q
What does xylem tissue transport?
A
Water and mineral ions
4
Q
What are xylem vessels adapted for?
A
Elongated hollow tubes without end walls lack organelles lignin thickened walls non-lignified pits
5
Q
What does phloem tissue transport?
A
Sugars and amino acids
6
Q
What are sieve tube elements adapted for?
A
Connected end-to-end sieve plates lack nuclei thin cytoplasm
7
Q
What are companion cells adapted for?
A
Connected to sieve tube elements large nucleus many mitochondria many ribosomes
