Lab 1: Complex Tissues

Question 1

vascular bundles

Answer 1

bundles of xylem and phloem tissues

Question 2

tracheids

Answer 2

long, slender with tapered ends
water moves cell-cell via the pits where resistance is lowest

Question 3

vessel elements

Answer 3

shorter and wider than tracheids
have pits, but Aldo perforations at end of each cell
much more efficient water transfer (like straw)

Question 4

transpiration

Answer 4

movement of water

Question 5

translocation

Answer 5

movement of sugar from source to sink cell

Question 6

source cells

Answer 6

photosynthetic cells in leaves, tissue where sugar enters phloem

Question 7

sink cells

Answer 7

cells that are actively dividing and need energy in roots and stems, tissue where sugar exits phloem

Question 8

sucrose concentration in cells

Answer 8

sink cells>companion cells>source cells

Question 9

if there is less solute, is water potential high or low?

Answer 9

water potential is high

Question 10

if there is more solute is water potential high or low?

Answer 10

water potential is low

Question 11

xylem

Answer 11

transports water

Question 12

phloem

Answer 12

transports sugar