Life Science- Plant Tissue

Question 1

Meristematic

Answer 1

Cells are always dividing

Growth point of cells

Question 2

Meristematic grows

Answer 2

Stem taller (buds) and wider (cambium)
Root deeper (root tip)

Question 3

Epidermal

Answer 3

Epi- outside 
Dermal- skin
Covers outside of plants
Closely packed- protection
Stem + leaves

Question 4

Epidermal have

Answer 4

Waxy cuticle

Root - not cuticle

Question 5

Specialized epidermal cells

Answer 5

Guard cell
2 guards- stomata
Breathing pores in leaves + stem

Question 6

Ground tissue

Answer 6

Main 
Parenchyma 
Chlorenchyma
Collenchyma
Sclerenchyma

Question 7

Parenchyma

Answer 7

Basic plant cell
Thin permeable cell walls
Fill spaces 
Air spaces between them 
Large vacuole

Question 8

Chlorenchyma

Answer 8

Parenchyma + chloroplasts
Photosynthesis
Green leaves + stem
Palisade mesophyll cell- closely packed, green leaves
Spongy mesophyll cell- loosely packed, air space to store CO2

Question 9

Collenchyma

Answer 9

Thickened cells walls at corners with cellulose
Cells are still alive - strength to stems
Flexible
More closely packed than parenchyma

Question 10

Sclerenchyma

Answer 10

Cell is impregnated with lignin (impermeable)
Cell dies
Hollow cell
Occurs near soft phloem and young xylem

Question 11

Vascular tissue

Answer 11

Transport tissue
Phloem
Xylem

Question 12

Phloem

Answer 12

Transports food and nutrients down
Sieve tubes + companion cell
Both living tissue

Question 13

Xylem

Answer 13

Transports water up
Cell is dead, hollow tubes
Vessels and tracheids
Strengthened and thickened with lignin (different patterns on inner wall annular/rigid, spiral reticulate)
In tracheid cells are connected by pits (small holes)