Chapter 28

Ground tissue consists mainly of __________ a. pith b. the walls of dead cells c. parenchyma cells d. cork but not bark

Which of the following cell types remain alive in mature tissue? a. sclerenchyma b. tracheids c. sieve elements d. vessel elements

Epidermis and periderm are ________ tissues. a. ground b. vascular c. dermal d. mesoderm

A vascular bundle in a leaf is called _____________ a. a vascular cylinder b. mesophyll c. a vein d. vascular cambium

Typically, vascular tissue is organized as _________ in stems and as ___________ in roots. a. multiple vascular bundles; one vascular cylinder b. one vascular bundle: multiple vascular cylinders c. one vascular cylinder; multiple vascular bundles d. multiple vascular cylinders; one vascular bundle

When guard cells swell, __________ a. transpiration ceases b. sugars enter phloem c. stomata open d. root cells die

Water transport from roots to leaves occurs by __________ a. a pressure gradient inside sieve tubes b. different solutes at source and sink regions c. the pumping force of xylem vessels d. transpiration, tension, and cohesion of water

Sugar transport from leaves to roots occurs by ____________ a. a pressure gradient inside sieve tubes b. different solutes at source and sink regions c. the pumping force of xylem vessels d. transpiration, tension, and cohesion of water

Roots and shoots lengthen through activity at____________ a. apical meristems b. lateral meristems c. vascular cambium d. cork cambium

The activity of lateral meristems ___________ older roots and stems. a. lengthens b. thickens c. both a and b d. has no effect on

Tree rings occur mainly __________ a. when there are droughts during the time the rings form b. where environmental conditions influence xylem cell size c. as epidermis replaces periderm

Match the terms with the best description. mesophyll potato cotyledons parallel veins vascular cylinder wood transpiration sieve plate taproot a. separates cells in phloem tubes b. photosynthetic parenchyma c. evaporation from stomata d. characteristic of monocot leaves e. only one in a monocot seed f. only in eudicots g. stem structure h. mass of secondary xylem i. central column in roots