AP BIOLOGY

PLANTS

TRANSPORT IN PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Phloem tissue is adapted by having no nucleus and little cytoplasm so that ____
A
there is more room for the central channel
B
liquids can flow from one cell to the next
C
so there is lots of energy
Explanation: 

Detailed explanation-1: -Phloem cells Adaptations: Made of living cells (as opposed to xylem vessels, which are made of dead cells) that are supported by companion cells. Cells are joined end-to-end and contain holes in the end cell walls (sieve plates) forming tubes which allow sugars and amino acids to flow easily through (by translocation)

Detailed explanation-2: -The sieve tube cells contain no organelles and very little cytoplasm to create more space for solutes to be transported.

Detailed explanation-3: -Phloem consists of living cells. The cells that make up the phloem are adapted to their function: Sieve tubes – specialised for transport and have no nuclei .

Detailed explanation-4: -Unlike xylem, phloem vessels contain cytoplasm, and this goes through the holes in the sieve plates from one cell to the next. Phloem transports sucrose and amino acids up and down the plant.

There is 1 question to complete.