Final Multiple choice (HW 10)

Which of the following statements about the vascular tissue system is not true?

four cell types occur in phloem; sieve tube members, companion cells, tracheids and vessel elements

Most of the plant body consists of the ___________ tissue system

ground

The older, darker wood in the center of a tree trunk is commonly called

heartwood

Axillary buds are located

in the upper angle between a leaf and the stem to which it is attached

Root hairs

increase the absorptive capacity of roots

If you were to relocate the pericycle of a plant root to the epidermal layer, how would it affect root growth

lateral roots would grow from the outer region of the root and fail to connect with the vascular tissue

The photosynthetic ground tissue in the middle of the leaf is called

mesophyll

Roots differ from stems because roots lack

nodes

Sieve tube members are part of the

phloem

Many vegetables are grown today through hydroponics, in which the plant roots exist primarily in an aqueous solution. Which of the following root structures is no longer beneficial in hydroponics?

root cap

Sclereids and fibers are examples of which plant tissue?

sclerenchyma

Each annual ring in a section of wood represents 1 year's growth of

secondary xylem

One main root, formed from the enlarging embryonic root, with many smaller lateral roots branching off it is a(n)

storage root system

Which dicot leaf tissues display the greatest amount of air space?

the spongy parenchyma

How do tracheids differ from vessel elements, in addition to their overall shape?

tracheids have only one type of passageway to allow movement of water from cell to cell, called a pit

The two lateral meristems responsible for secondary growth are the

vascular cambium and cork cambium

The center of a herbaceous eudicot root is composed of ______, whereas the center of a monocot root is composed of _________.

xylem; pith

The function of the ______ causes leaves to shed in the fall

abscission zone

The two simple tissues that are specialized for support are

collenchyma and sclerenchyma

The noncellular waxy layer secreted by the epidermis over its aerial (shoot) surface is called

cuticle