Question 1

Four of the five answers listed below are functions of roots.Select the EXCEPTION.

Accepted Answer

Synthesis of food is not a function of roots. It is the function of leaves through the process of photosynthesis.

Question 2

As water is pulled through the xylem,what prevents the water column from breaking?

Accepted Answer

The hydrogen bonds between water molecules create cohesion, which helps maintain the integrity of the water column as it is pulled through the xylem.

Question 3

Four of the five answers listed below are characteristics of xylem.Select the EXCEPTION.

Accepted Answer

Xylem primarily conducts water and minerals from roots to shoots, not dissolved sugars.

Question 4

Under which of the following conditions would evaporation through stomata stop?
a.
a hot dry day
b.
a dried out soil
c.
a day with 100% humidity
d.
damaged xylem
e.
all these conditions would stop evaporation through stomata

Accepted Answer

The answer of Under which of the following conditions would...

Question 5

Four of the five answers listed below are characteristics of eudicots.Select the EXCEPTION.

Accepted Answer

Eudicots have leaf veins that form a net-like pattern, not veins that run parallel like monocots.

Question 6

Four of the five answers listed below are characteristic of sclerenchyma cells.Select the EXCEPTION.

Accepted Answer

Sclerenchyma cells are typically dead at maturity and have thick, lignified cell walls that provide support and structure for the plant. Sclereids (A), which are often found in seed coats (B), are a type of sclerenchyma cell. The gritty texture of pear cells (D) is due to the presence of sclerenchyma cells, and sclerenchyma cells are used in the manufacture of paper, cloth, and rope (E). The only exception listed is (C) remain alive after maturity, which is not characteristic of sclerenchyma cells.

Question 7

Which of the following would NOT be a translocation sink?

Accepted Answer

Heartwood is the central, dead portion of a tree trunk that provides structural support. As it is not a living tissue, it cannot act as a translocation sink.

Question 8

Which of the following is NOT true about the movement of water through a plant?

Accepted Answer

The process of moving water through a plant is not called translocation, but rather transpiration. Translocation refers to the movement of sugars and other nutrients through a plant. All of the other statements are true. Water is pulled through the plant by transpiration, the process is passive, and it occurs through columns of dead cells called xylem.

Question 9

Choose the one most appropriate answer for each.
a.gives rise to periderm
b.phloem cells that help load the phloem pipelines
c.dead cells with perforation plates; more efficient at water conduction than other xylem cells
d.cells that conduct food from photosynthetic source area to storage sink area
e.a cylinder of vascular tissue sheathed by parenchyma cells
f.clusters of strands containing xylem and phloem
g.dead cells without perforation plates; conducting cells of xylem
h.cells with thick secondary walls impregnated with lignin that are especially abundant in fruits and seeds
i.the principal photosynthetic region of a leaf
j.regions that can undergo mitosis
k.gas exchange and storage plus photosynthesis
-companion cells

Accepted Answer

Companion cells are living cells that are connected to sieve tube members and transfer sugars and other organic solutes into them.

Answer: C
 Vascular tissue in the root refers to the xylem and phloem that transport water and nutrients throughout the plant.

Answer: D
 Living cells that conduct sugars and other organic solutes refer to the sieve tube members and companion cells in the phloem.

Answer: J
 Regions of undifferentiated cells that can divide rapidly refer to meristems, which are responsible for the plant's growth and development.

Answer: K
 The bottom layer of photosynthetic parenchyma in a leaf with large air spaces between the cells refers to the spongy mesophyll.

Question 10

Which of the following statements is correctly related to the opening of stomata?

Accepted Answer

The opening of stomata is controlled by the movement of potassium ions (K+) into and out of guard cells. When potassium ions (K+) are actively pumped into the guard cells, water flows into the cells by osmosis, causing them to swell and the stomata to open. Therefore, statement A is the correct one.

Question 11

The movement of water through a plant is driven by

Accepted Answer

The answer of The movement of water through a plant...

Question 12

Which of the following is true of movement through the phloem?

Accepted Answer

All of the given options are true about movement through the phloem. Movement through phloem occurs through live cells called sieve tube members, and the movement between them occurs through plasmodesmata. The movement through the phloem is bidirectional and not necessarily up. The phloem cells through which the movement of photosynthates and other molecules occur are non-nuclear, as they have lost their organelles during differentiation to enable easier transport.

Question 13

Four of the five answers listed below are related by their participation in water movement through plants.Select the EXCEPTION.

Accepted Answer

Photosynthesis is not directly related to water movement through plants. It is the process by which plants produce their own food using sunlight, carbon dioxide, and water. However, water is still necessary for photosynthesis to occur and a loss of water through transpiration can affect photosynthesis.

Question 14

Which of the following is a difference between movement in the xylem and movement in the phloem?

Accepted Answer

Movement in the xylem is by a pulling action, as it is driven by transpiration from the leaves, while movement in the phloem is by a pushing action, as it is driven by active transport from source to sink. The other choices are not true.

Question 15

Four of the four answers listed below are types of complex plant tissue.Select the EXCEPTION.

Accepted Answer

The answer of Four of the four answers listed below...

Question 16

Four of the five answers listed below are characteristics of phloem.Select the EXCEPTION.

Accepted Answer

Phloem is made up of living cells, so it cannot consist only of dead cell walls.

Question 17

Four of the five answers listed below are related by a common region of the plant body.Select the EXCEPTION.

Accepted Answer

The root cap is a structure located at the tip of the root that functions in protecting the growing point and secreting lubricating substances to aid in root elongation. It is not part of the aerial region of the plant body, which includes the leaf, node, axillary bud, and stem.

Question 18

To which of the following processes is transpiration most analagous?

Accepted Answer

Transpiration is the process of water moving up through the roots, stems, and leaves of a plant and then evaporating from the leaves. This process can be compared to sucking soda through a straw because in both cases there is a movement of a fluid (water in transpiration and soda in sucking) through a small area (stomata in transpiration and a straw in sucking). The other options listed do not accurately represent the process of transpiration.

Question 19

Four of the five answers listed below are parts of a leaf.Select the EXCEPTION.

Accepted Answer

Pith is not a part of the leaf, but rather a central tissue found in the stem of some plants. The other options are all parts of a leaf. Stoma refers to the pores on the underside of a leaf that allow for gas exchange. Cuticle is the waxy layer on the surface of a leaf that aids in water conservation. Mesophyll refers to the layer of tissue between the upper and lower epidermis of a leaf where photosynthesis occurs. Petiole is the stalk that connects the leaf blade to the stem.

Question 20

Four of the five answers listed below are functions of parenchyma tissue.Select the EXCEPTION.

Accepted Answer

Parenchyma tissue primarily functions in storage, photosynthesis, healing, and secretion, but not in providing structural support, which is typically a function of sclerenchyma or collenchyma tissues.

Quiz 27: Plant Form and Function