Plant Cells and Tissues

Question 1

What is the the Epidermal Cells?

Answer 1

Irregular shaped cells that form a protective layer on the surface of the leaf.

Question 2

What are the guard cells?

Answer 2

Sausage shaped thick walled cells, facing the central stoma, these control the exchange of gases.

Question 3

What is the Palisade Mesophyll?

Answer 3

Columnar shaped cells, they contain many chloroplasts. Primary area for photosynthesis.

Question 4

What is the Spongy Mesophyll?

Answer 4

Round shaped cells, the arrangement of these cells allows gases to diffuse easily. This is the secondary place for photosynthesis.

Question 5

What is Phloem?

Sieve tube?

Companion cell?

Answer 5

Phloem tissue is made up of two cells.

Sieve tube cells connected via sieve plates providing a continuous stream of cytoplasm for transport of carbohydrates
The companion cells have a large nucleus and control the function of the sieve tubes.

Question 6

What is Xylem?

Lignin rings?

Answer 6

Xylem cells lost their end walls and cytoplasm. They form hollow tubes which are supported by lignin rings, lignin is a woody tissue which aid in supporting.
Xylem is responsible for transporting water and minerals.