specialised cells

What is the function of red blood cells? You may choose more than one answer.

• absorb water and mineral salts

• transport water and mineral salts

• transport oxygen

• transport carbon dioxide

What is the function of xylem vessels? You may choose more than one answer.

• absorb water and mineral salts

• transport water and mineral salts

• transport oxygen

• provide mechanical support

What is the function of root hair cells?

• absorb water and mineral salts

• transport water and mineral salts

• transport oxygen

• provide mechanical support

How are red blood cells adapted to perform their function? You may choose more than 1 option.

• biconcave shape

• long and narrow extension

• no protoplasm

• no nucleus

• contain haemoglobin

How are xylem vessels adapted to perform their function? You may choose more than 1 option.

• no cross walls

• long and narrow extension

• no protoplasm

• contain lignin

• contain many mitochondria

How are root hair cells adapted to perform their function? You may choose more than 1 option.

• no cross walls

• long and narrow extension

• no protoplasm

• contain lignin

• contain many mitochondria

How does the presence of lignin adapt xylem vessels for their function?

• more efficient absorption

• more space in the cell

• greater ability to hold oxygen

• greater mechanical strength

How does the absence of protoplasm and cross walls adapt xylem vessels for their function?

• more efficient absorption

• more space in the cell

• reduced resistance to water flow

• greater mechanical strength

How does the biconcave shape adapt red blood cells for their function?

• increased rate of diffusion in/out of cell

• more space in the cell for haemoglobin

• reduced resistance to water flow

• greater mechanical strength

The red pigment in red blood cells that is able to bind to oxygen is called (a)   .