Unit 4

Question 1

Guard Cells

Answer 1

specialized cells in the epidermis that control the opening and closing stoma by responding to changes in water pressire

Question 2

Air spaces

Answer 2

spaces of air

Question 3

Mesophyll

Answer 3

cells packed with chloroplasts and carry out nearly all photosynthetic activity of most plantd

Question 4

(Waxy Cuticle)

Answer 4

in plants a thick waxy layer on exposed outer surfaces of cells that protects them in water loss and injury

Question 5

Stoma

Answer 5

pore like openings in the underside of the leaf that allow carbon dioxide and oxygen to diffuse in and out of the leaf

Question 6

Upper Epidermis

Answer 6

a single layer of cells containing few or no chloroplasts

Question 7

Palisade Mesophyll

Answer 7

closely packed cells that absorb much of the light that enters the leaf

Question 8

Spongy Mesophyll

Answer 8

a loose tissue with many air spaces between its cells

Question 9

Vein (vascular bundle)

Answer 9

in plants a cluster of vascular tissue in leaves

Question 10

Xylem

Answer 10

vascular tissue that carries water upward from the roots to every part of the plant

Question 11

Phloem

Answer 11

vascular tissue responsible for the transport of the nutrients and the carbs produced by the photosynthesis