Units 29 & 30

Question 1

Define Xylem

Answer 1

vascular tissue that transports water & dissolved materials

Question 2

Define Phloem

Answer 2

vascular tissue that facilitates the transport of carbon compounds (sugars, amino acids, etc.)

Question 3

Define Unidirectionally

Answer 3

one direction only

Question 4

Define Transpiration

Answer 4

loss of water vapour from plant leaves

Question 5

Define Stomata

Answer 5

tiny pores in plant

Question 6

Define Capillary Action

Answer 6

ability of a liquid to move through narrow tubes from cohesion, adhesion, and surface tension

Question 7

Define Cohesive

Answer 7

attraction between dipolar molecules of same type

Question 8

Define Adhesive

Answer 8

attraction between charged molecules & surface

Question 9

Define Lignin

Answer 9

complex polymer/polysaccharide that binds to cellulose, strengthens & waterproofs the xylem

Question 10

Define Impermeable

Answer 10

barrier that thwarts substances

Question 11

Define Dicotyledonous

Answer 11

type of flowering plant with 2 embryonic leaves (cotyledons) in its seeds

Question 12

Define Epidermis

Answer 12

outermost layer of cells that covers an organism

Question 13

Define Cortex

Answer 13

layer of tissue between vascular bundles & epidermis

Question 14

Define Vascular Bundles

Answer 14

the xylem & phloem combine

Question 15

Define Root Pressure

Answer 15

hydrostatic pressure generate when mineral ions are actively transported into the root hair cell of a plant, which in turn draws water in by osmosis, creating a pressure which pushes water up the xylem

Question 16

Define Sources

Answer 16

area of a plant that is producing or releasing carbon compounds

Question 17

Define Sink

Answer 17

area of a plant that is consuming or storing carbon compounds

Question 18

Define Translocation

Answer 18

in plants, the movement of sap through the phloem

Question 19

Define Bidirectional

Answer 19

involving two opposite directions

Question 20

Define Sieve Tube Elements

Answer 20

specialized cells that form the ‘tube’ of the phloem