BIOLOGY 106 EXAM 1 QUESTIONS &
ANSWERS!!
Name the three basic plant organs? - ANSWERroot, steams, and leaves
Describe the most important role of root hairs? - ANSWERRoot hairs absorb water
and minerals
What is the difference between a stolon and a rhizome? - ANSWERstolon grows
across soil above ground, rhizome is a root like stem that grows underground
Pneumatophores are good for what? - ANSWERThey enable the hot system to
obtain oxygen.
What are the three basic tissues in a plant, and in what order (from outside to the
inside) do they exist in the plant body? - ANSWERDermal, ground, and vascular
tissue
What is the role of the vascular tissue? - ANSWERLong distance transport
Sclerenchyma cells differ from parenchyma cells in what? - ANSWERSclerenchyma
cells have a secondary wall.
Xylem is needed in the plant for what? - ANSWERTo conduct water and dissolve
minerals upward from the roots into the shoots
Phloem is a long distance transport tissue that is mainly required to transport what? -
ANSWERSugars
Define a meristem. - ANSWERIts an unspecialized tissue that divide when
conditions permit which leads to mew cells that become specialized
What types of meristems do you find in a plant body and how do they differ in
function? - ANSWER-Apical meristems: located at the tips and roots and shoots and
in the axillary buds of shoots, provide additional cells that enable growth in length
-Lateral meristems: produce secondary tissues from a ring of vascular cambium in
stems and roots
Label the different parts of the root shown below. - ANSWERA: Epidermis
B: Cortex
C: Vascular Cylinder
D: Root Hairs
E: Mitotic Cells
F: Root Cap
G: Zone of Differentiation
H: Zone of elongation
I: Zone of cell division
, The primary growth of a root is mainly accomplished by what process and in which
zone? - ANSWERPrimary growth occurs in apical meristems at the tips of roots and
shoots and in the axillary buds of shoots. Primary growth in roots occurs in three
zones: the zone of cell division, the zone of elongation, and the zone of
differentiation (zone of maturation)
What is a basic difference in the organization of vascular tissue in eudicots when you
compare root and shoot tissues? - ANSWERShoot: ring like
Root: center
In a leaf, what cell type is mainly necessary for CO2 and water vapor exchange with
the atmosphere? - ANSWERMesophyll.
If you look at Figure 28.19 (primary and secondary growth of a stem), what two
meristems are required for secondary growth, and where are they located in the
shoot? - ANSWER
Which of the following statements is correct for stomata opening?
a) Stomata take up K+ into their guard cells, which attracts water to enforce their
opening.
b) Stomata export K+ from their guard cells, which causes water to diffuse out, and
that is the trigger for stomata to open up.
c) Na+ is the main ion source to control stomata opening in plants.
d) Most critical is the closing of aquaporins in the cell wall of guard cells
to open up stomata.
e) Stomata have small muscles that contract and open up the kidney
shaped guard cells. - ANSWERa) Stomata take up K+ into their guard cells, which
attracts water to enforce their opening.
Xerophytes are?
a) land dwellers that are adapted to cope with heavy rains at certain times
without preventing transpiration
b) small herbivorous insects that thrive on dry plants
c) plants that are adapted to and tolerate a dry climate with little water
d) plants that use up large quantities of water in a dry environment - ANSWERc)
plants that are adapted to and tolerate a dry climate with little water
What does a woody tree trunk that is many years old mainly consist of? -
ANSWERBark
What part of a tree trunk contains the majority of the living cells? -
ANSWERLenticels
What are the two key tissues that allow plants to transport water or organic nutrients,
respectively, over long distances? - ANSWERXylem and Phloem.
Gas exchange
(a) In the root, plants need to take up more CO2 or O2?
ANSWERS!!
Name the three basic plant organs? - ANSWERroot, steams, and leaves
Describe the most important role of root hairs? - ANSWERRoot hairs absorb water
and minerals
What is the difference between a stolon and a rhizome? - ANSWERstolon grows
across soil above ground, rhizome is a root like stem that grows underground
Pneumatophores are good for what? - ANSWERThey enable the hot system to
obtain oxygen.
What are the three basic tissues in a plant, and in what order (from outside to the
inside) do they exist in the plant body? - ANSWERDermal, ground, and vascular
tissue
What is the role of the vascular tissue? - ANSWERLong distance transport
Sclerenchyma cells differ from parenchyma cells in what? - ANSWERSclerenchyma
cells have a secondary wall.
Xylem is needed in the plant for what? - ANSWERTo conduct water and dissolve
minerals upward from the roots into the shoots
Phloem is a long distance transport tissue that is mainly required to transport what? -
ANSWERSugars
Define a meristem. - ANSWERIts an unspecialized tissue that divide when
conditions permit which leads to mew cells that become specialized
What types of meristems do you find in a plant body and how do they differ in
function? - ANSWER-Apical meristems: located at the tips and roots and shoots and
in the axillary buds of shoots, provide additional cells that enable growth in length
-Lateral meristems: produce secondary tissues from a ring of vascular cambium in
stems and roots
Label the different parts of the root shown below. - ANSWERA: Epidermis
B: Cortex
C: Vascular Cylinder
D: Root Hairs
E: Mitotic Cells
F: Root Cap
G: Zone of Differentiation
H: Zone of elongation
I: Zone of cell division
, The primary growth of a root is mainly accomplished by what process and in which
zone? - ANSWERPrimary growth occurs in apical meristems at the tips of roots and
shoots and in the axillary buds of shoots. Primary growth in roots occurs in three
zones: the zone of cell division, the zone of elongation, and the zone of
differentiation (zone of maturation)
What is a basic difference in the organization of vascular tissue in eudicots when you
compare root and shoot tissues? - ANSWERShoot: ring like
Root: center
In a leaf, what cell type is mainly necessary for CO2 and water vapor exchange with
the atmosphere? - ANSWERMesophyll.
If you look at Figure 28.19 (primary and secondary growth of a stem), what two
meristems are required for secondary growth, and where are they located in the
shoot? - ANSWER
Which of the following statements is correct for stomata opening?
a) Stomata take up K+ into their guard cells, which attracts water to enforce their
opening.
b) Stomata export K+ from their guard cells, which causes water to diffuse out, and
that is the trigger for stomata to open up.
c) Na+ is the main ion source to control stomata opening in plants.
d) Most critical is the closing of aquaporins in the cell wall of guard cells
to open up stomata.
e) Stomata have small muscles that contract and open up the kidney
shaped guard cells. - ANSWERa) Stomata take up K+ into their guard cells, which
attracts water to enforce their opening.
Xerophytes are?
a) land dwellers that are adapted to cope with heavy rains at certain times
without preventing transpiration
b) small herbivorous insects that thrive on dry plants
c) plants that are adapted to and tolerate a dry climate with little water
d) plants that use up large quantities of water in a dry environment - ANSWERc)
plants that are adapted to and tolerate a dry climate with little water
What does a woody tree trunk that is many years old mainly consist of? -
ANSWERBark
What part of a tree trunk contains the majority of the living cells? -
ANSWERLenticels
What are the two key tissues that allow plants to transport water or organic nutrients,
respectively, over long distances? - ANSWERXylem and Phloem.
Gas exchange
(a) In the root, plants need to take up more CO2 or O2?
