Biotechnology

Question 1

vegetative propagation

Answer 1

asexual method of plant reproduction that occurs in its leaves, roots and stem

Question 2

veg. propagation examples?

Answer 2

totipotent cells, callus

Question 3

grafting

Answer 3

tissues of plants are joined so as to continue their growth together

Question 4

genetic modification example

Answer 4

bt corn

Question 5

benefits of genetically engineered corn

Answer 5

90% less fungal toxin that causes cancer and birth defects

Question 6

genetic engineering for human health

Answer 6

• modified cassava for world hunger
• increase iron and beta carotene

Question 7

transgene escape

Answer 7

transgenes making thier way into wild weeds…creating “superweeds”

Question 8

roots

Answer 8

absorb nutrients and water

Question 9

what does a stem consist of?

Answer 9

nodes and internodes

Question 10

nodes

Answer 10

the points at which leaves are attached

Question 11

internodes

Answer 11

stem segments between nodes

Question 12

what does a leaf consist of

Answer 12

flattened blade, a stalk (petiole); joins leaf to node

Question 13

common type of plant cell

Answer 13

parenchyma, collenchyma, sclerenchyma

Question 14

sclerenchyma

Answer 14

dead at functional maturity

Question 15

cells of ___ are alive at maturity

Answer 15

phloem

Question 16

what do apical meristems do?

Answer 16

elongate shoots and roots; “primary growth”

Question 17

lateral meristems

Answer 17

thickness to woody plants; secondary growth

Question 18

vascular cambium

Answer 18

adds layers of seocndary xylem and phloem

Question 19

cork cambium

Answer 19

replace the epidermis with periderm; thicker and tougher

Question 20

ways to increase plant size?

Answer 20

• cell number
• cell expansion

Question 21

what restricts cell elongation

Answer 21

cellulose microfibrils

Question 22

mechanism used by plant cells

Answer 22

position-dependent

Question 23

mechanism used by animal cells

Answer 23

lineage-dependent