Life: The Science of Biology

David E. Sadava, David M. Hilliss, H. Craig Heller,May Berenbaum

Chapter 34

The Plant Body - all with Video Answers

Educators

Chapter Questions

Problem 1

Which of the following is a difference between monocots and eudicots?
$a$. Only eudicots have phytomers.
$b$. Only monocots have shoot and root apical meristems.
$c$. Monocot stems do not undergo secondary growth.
$d .$ The vascular bundles of monocot stems are commonly arranged as a cylinder.
$e .$ Eudicot embryos commonly have one cotyledon.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 2

Roots
$a$ always form a fibrous root system that holds the soil.
$b$. possess a root cap at their tip.
$c.$ form branches from axillary buds.
$d$. are commonly photosynthetic.
$e .$ do not show secondary growth.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 3

The primary plant cell wall
$a.$ lies immediately inside the plasma membrane.
$b$. is an impermeable barrier between cells.
$c .$ is always waterproofed with either lignin or suberin.
$d$. always consists of a primary wall and a secondary wall, separated by a middle lamella.
$e .$ contains cellulose and other polysaccharides.

Christina Sorrentino

Christina Sorrentino

Numerade Educator

Problem 4

Which statement about parenchyma cells is not true?
$a.$They are alive when they perform their functions.
$b$. They typically lack a secondary wall.
$c$. They often function as storage depots.
$d$. They are the most common cell type in the plant body.
$e .$ They are found only in stems and roots.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 5

Tracheids and vessel elements
$a .$ must die to become functional.
$b,$ are important constituents of all seed plants.
$c.$ have no secondary cell wall.
$d$. are always accompanied by companion cells.
$e.$ are found only in the secondary plant body.

Christina Sorrentino

Christina Sorrentino

Numerade Educator

Problem 6

Which statement about meristems is not true?
$a$. They are formed during embryogenesis.
$b$. They have secondary cell walls.
$c.$ Their cells have small central vacuoles.
$d .$ They are clusters of undifferentiated cells.
$e .$ They retain the ability to produce new cells indefinitely.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 7

The pericycle
$a$. is the innermost layer of the cortex.
$b$. is the tissue within which lateral roots arise.
$c .$ consists of highly differentiated cells.
$d$. forms a star-shaped structure at the very center of the root.
$e .$ is waterproofed by suberin.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 8

Which of these statements is true of secondary growth, but not primary growth?
$a.$It occurs in eudicots and monocots.
$b$. It involves the proliferation of roots and shoots through branching.
$c .$ It derives from the vascular cambium and the cork cambium
$d$. It occurs in palms.
$e .$ It derives from the shoot apical meristem.

Courtney Burson

Courtney Burson

Numerade Educator

Problem 9

Periderm
$a .$ contains lenticels that allow for gas exchange.
$b$. is produced during primary growth.
$c .$ is permanent; it lasts as long as the plant does.
$d$. is the innermost part of the plant.
$e .$ contains vascular bundles.

Christina Sorrentino

Christina Sorrentino

Numerade Educator

Problem 10

Which statement about leaf anatomy is not true?
a. Opening of stomata is controlled by guard cells.
b. The cuticle is secreted by the epidermis.
c. The veins contain xylem and phloem.
d . The cells of the mesophyll are packed together, minimizing air space.
e. The spines of cacti are actually modified leaves.

Courtney Burson

Courtney Burson

Numerade Educator