Cells & Tissues

Question 1

Cell types

Answer 1

parenchyma - throughout body (epidermis, peridermis, ground)

Question 2

3 types of ground tissues

Answer 2

1: parenchyma
2: collenchyma
3: sclerenchyma

Question 3

Parenchyma

Answer 3

alive @ maturity
primary wall ( and smtimes secondary)
used for support, food storage
mitotically active
secretion, photosynthesis, respiration, healing
can convert to aerenchyma: large holes to help leaf float

Question 4

Collenchyma

Answer 4

thickened primary wall
alive @ maturity
found in bundles - supportive but flexible
helps solidify outer edge of plant

Question 5

Sclerenchyma

Answer 5

dead @ maturity
primary and secondary wall
2 types:
- fibers
-sclereids

Question 6

Fibers

Answer 6

long, thin cell walls
high deposits of lignin - used for storage
found in stems, bundles
Linen - fibers from flax plants

Question 7

Sclereids

Answer 7

short, branched
found in shells of seeds
very filled in & sturdy
protective coating