Question 1

Leaves originate from the edges of _______ as initial cells that differentiate into leaf primordia throughout the life of the plant as it continues to grow.

Accepted Answer

A)  buds 
B)  apical meristems 
C)  internodes 
D)  flowers 
E)  axillary buds

Question 2

At every node of a plant, one will find _______ attached.

Accepted Answer

A)  one or more flowers 
B)  one or more leaves 
C)  one or more axillary buds 
D)  an internode 
E)  Both a and b

Question 3

Refer to the figure showing various types of ground tissue cells.  Which of the cell types shown (A‒D) is/are most commonly associated with support of the plant body? Identify the cell type(s).

Accepted Answer

The answer of Refer to the figure showing various types...

Question 4

A scientist discovers what she thinks is a new monocot with a taproot system and reticulate veins in its leaves.Which of the following best explains this unusual combination?

Accepted Answer

A)  There are mutations due to radiation. 
B)  This is an unusual development induced by extreme cold. 
C)  This is an orchid. 
D)  It is a hybrid between carrots and ferns. 
E)  She is mistaken; this cannot be a monocot. It is a eudicot.

Question 5

Refer to the figure showing a plant periderm.  Structure A in the figure is found in the secondary body of a woody plant.Which structure found in the primary plant body has a similar function?

Accepted Answer

A)  Stoma 
B)  Leaf hair 
C)  Root hair 
D)  Mesophyll cell 
E)  Vessel element

Question 6

You are studying an unusual plant with organs that have the appearance of both stems and leaves.If molecular analysis shows these organs to be true leaves, you would expect their development to be

Accepted Answer

A)  differentiated. 
B)  indeterminate. 
C)  determinate. 
D)  undifferentiated. 
E)  rapid.

Question 7

The structure that supports the embryo properly as it develops, specifically in early development, is referred to as the

Accepted Answer

A)  suspensor. 
B)  lignin. 
C)  apical meristem. 
D)  lateral meristem. 
E)  cotyledon.

Question 8

Which of the following best describes the origin of wood?

Accepted Answer

A)  Xylem cells enlarge and deposit large amounts of lignin. 
B)  Primary meristems increase the amount of xylem deposited. 
C)  Lateral meristems contribute to continuous increases in vascular tissue. 
D)  Spongy mesophyll cells become cork cambium. 
E)  Cork cambium develops into vascular cambium which matures into wood.

Question 9

Unlike eudicots, monocots have a scattered arrangement of vascular bundles in their stems and possess a central region inside the xylem layer of their roots called the _______.

Accepted Answer

The answer of Unlike eudicots, monocots have a scattered arrangement...

Question 10

Some species of rose, which are dicots, can grow on steep hillsides because of a taproot system that helps

Accepted Answer

A)  maximize the surface area for absorption. 
B)  the plants use their roots as food storage organs. 
C)  anchor the plant. 
D)  hold the soil together. 
E)  transport water and minerals to the stem.

Question 11

The development of modern corn from teosinte

Accepted Answer

A)  was achieved by biotechnological approaches. 
B)  was achieved by asexual propagation. 
C)  illustrates the wealth of genetic diversity in the genomes of crop plants. 
D)  was achieved by natural selection. 
E)  began recently.

Question 12

You are studying an insect related to aphids that feeds on plant sap.This insect bores a hole in the plant until it can feed using an appendage on its front legs called a "spile." What specific plant structure does the spile bore into?

Accepted Answer

A)  Sieve tube element 
B)  Guard cell 
C)  Companion cell 
D)  Vessel element 
E)  Parenchyma

Question 13

Refer to the figure showing a root tip.  Which statement about primary growth of the root is false?

Accepted Answer

A)  Root hairs are derived from the procambium via the pericycle. 
B)  The root apical meristem produces the root primary meristems. 
C)  The procambium produces xylem and phloem. 
D)  There is no clear delineation between the three growth zones of the root. 
E)  The procambium is interior to the ground meristem.

Question 14

Lenticels are spongy regions on the surface of some woody stems that function in

Accepted Answer

A)  water uptake. 
B)  water conservation. 
C)  gas exchange. 
D)  protection of growing layers. 
E)  support of the plant.

Question 15

Water is conducted in xylem tissue, and carbohydrates and nutrients are transported in _______ tissue.

Accepted Answer

The answer of Water is conducted in xylem tissue, and...

Question 16

A stem is observed to increase in diameter from one April to the next.A cross section of the stem will show that the diameter increased because

Accepted Answer

A)  primary xylem cells divided. 
B)  phloem cells divided. 
C)  primary xylem cells elongated. 
D)  vascular cambium cells divided. 
E)  phloem cells elongated.

Question 17

The vascular tissue in stems undergoing primary growth is organized into

Accepted Answer

A)  buds. 
B)  rays. 
C)  concentric rings. 
D)  vascular bundles. 
E)  xylem bundles.

Question 18

The roots and shoots of plants show uninterrupted growth known as _______ growth while some of their organs show _______ growth.

Accepted Answer

A)  determinate; indeterminate 
B)  indeterminate; determinate 
C)  primary; secondary 
D)  secondary; primary 
E)  lateral; apical

Question 19

Which of the following is least likely to be formed from an axillary bud?

Accepted Answer

A)  Flower 
B)  Branch 
C)  Runner 
D)  Leaf 
E)  Root

Question 20

A mutant mustard plant has a number of novel features; for example, it does not absorb water and minerals from the soil as readily as wild-type plants do.The abnormality of the mutant plant is most likely in its

Accepted Answer

A)  cortex structure. 
B)  root hairs. 
C)  endodermis structure. 
D)  xylem placement. 
E)  pith diameter.

Exam 33: The Plant Body