2.4

Question 1

What is cell differentiation? (1)

Answer 1

It is the specialisation of cells in structure to carry out the role that it’ll carry out.

Question 2

What is the advantage of cellular differentiation? (1)

Answer 2

(1) every cell is adapted to perform its function MORE EFFECTIVELY, so it allows cells to be MORE EFFICIENT

Question 3

Explain how the 3 tissues in the stomach help it function. (6)

Answer 3

(1) muscle —> (4) churns & mixes the stomach contents
(2) epithelium —> (5) protects the stomach wall & produces secretions
(3) connective tissue —> (6) holds together other tissues (strength)

Question 4

Explain how the 5 tissues in a leaf helps it to function. (10)

Answer 4

(1) PALISADE MESOPHYLL —> (6) carry out photosynthesis
(2) SPONGY MESOPHYLL —> (7) gaseous diffusion
(3) EPIDERMIS —> (8) protects the leaf & allows gaseous diffusion
(4) PHLOEM —> (9) transports organic materials away
(5) XYLEM —> (10) transports water & ions into the leaf

Question 5

“Why is an artery described as an organ whereas a blood capillary isn’t?” (2)

Answer 5

(1) An artery is made up of more than 1 tissue,
(2) whereas a blood capillary is made up of only 1 tissue