Question 1

Some plant leaves and stems are covered with hairs.

Accepted Answer

Some plant leaves and stems are indeed covered with hairs, also known as trichomes. These hairs can serve various purposes such as protecting the plant from herbivores, reducing water loss, and reflecting sunlight.

Question 2

The waxy material known as the Casparian strip is found on

Accepted Answer

The Casparian strip is a waxy material found in the endodermal cells of plant roots that acts as a selectively permeable barrier, controlling the movement of water and other substances into the vascular system of the plant.

Question 3

Which of the following statements describes the arrangement of tissues in the eudicot root?

Accepted Answer

The answer of Which of the following statements describes the...

Question 4

Which cell found in phloem tissue has a nucleus?

Accepted Answer

Companion cells, found in phloem tissue, retain their nucleus throughout their life, aiding in the support and functioning of the sieve-tube members, which lack nuclei.

Question 5

In lab, your instructor gives you a plant and asks you to identify a tissue where the cells lack a nucleus. Which tissue will you identify?

Accepted Answer

Sieve-tube members lack a nucleus to allow for easier transport of nutrients throughout the plant.

Question 6

Which cells are relatively unspecialized and correspond to a generalized plant cell?

Accepted Answer

Parenchyma cells are relatively unspecialized and correspond to a generalized plant cell. They have thin cell walls and often contain large vacuoles, making them versatile for many functions such as storage, photosynthesis, and secretion. Epidermal cells, tracheids, sclerenchyma cells, and meristem cells are all specialized cells with specific roles in the plant.

Question 7

Which of these associations is correct?

Accepted Answer

Xylem cells are responsible for the transport of water and minerals from the roots to the rest of the plant.

Question 8

The iris is a plant with long, sword-like leaves. Its flowers have six petals that form a tongue and "flags." When you cut through the stem to cut flowers for a bouquet arrangement, the many vascular bundles form tough "strings" throughout the stem. From this description, it is obvious that the iris is a

Accepted Answer

The long, sword-like leaves, six-petaled flowers, and vascular bundles arranged in a scattered pattern throughout the stem are all characteristic features of monocotyledons, which include plants like lilies, grasses, and orchids. The presence of tough "strings" formed by the vascular bundles is also a common trait in monocots. Therefore, option C is the best choice.

Question 9

You need to identify a plant but it is winter and the leaves, flowers, fruits, are not available. Your best clue to whether it is a monocot or a eudicot is to

Accepted Answer

Monocots typically have scattered vascular bundles in their stems, whereas eudicots (dicots) have their vascular bundles arranged in a distinct ring. This structural difference is a reliable way to distinguish between the two groups when other features are not available.

Question 10

Monocots differ from eudicots in that monocots have

Accepted Answer

Monocots have leaf veins that are parallel, while eudicots have leaf veins that are branched.

Question 11

The fibers that get stuck between your teeth when you eat celery are

Accepted Answer

The fibers in celery that get stuck between your teeth are collenchyma, which are elongated cells with thickened cell walls that provide support and flexibility to the plant.

Question 12

The tissue in a root that functions in food storage is the

Accepted Answer

The cortex of a root is responsible for food storage. The epidermis is the outermost layer of cells and is mainly responsible for protection. The endodermis is a layer of cells that helps regulate the movement of nutrients into the vascular tissue. The vascular cylinder is the central region of the root where the xylem and phloem are located. The Casparian strip is a waxy layer found in the endodermis that helps regulate the movement of water and minerals into the vascular tissue.

Question 13

Entrance of minerals into the vascular cylinder of a eudicot root are regulated by the

Accepted Answer

The endodermis is the innermost layer of the cortex and regulates the entrance of minerals into the vascular cylinder of a eudicot root through a specialized tissue called the Casparian strip. This ensures that only selectively permeable nutrients enter the vascular cylinder and prevents harmful substances from entering.

Question 14

Your task in laboratory is to find cells that have projections which function to increase surface area for absorption of water and minerals. Which of the following slides would you use to find these cells?

Accepted Answer

Root hairs, which are extensions of root epidermal cells, increase the surface area for water and mineral absorption. These are found in the zone of maturation in roots, making option E the correct choice.

Question 15

Xylem tissue contains

Accepted Answer

Xylem tissue is primarily responsible for transporting water and minerals from the roots to the rest of the plant. Vessel elements and tracheids are specialized cells in xylem tissue that help to facilitate this process. Sieve-tube members and companion cells, on the other hand, are found in phloem tissue and are responsible for transporting sugars and other organic compounds throughout the plant. Apical meristem is responsible for plant growth, while epidermis and ground tissue are other types of plant tissues that serve various functions such as protection and support. Parenchyma and sclerenchyma cells are also types of plant tissues, but they are not typically found in xylem tissue.

Question 16

Which of the following is a monocot?

Accepted Answer

Palm trees are monocots, characterized by having one cotyledon (embryonic leaf) in their seeds, parallel veins in their leaves, and fibrous root systems. Dandelions, oak trees, maple trees, and roses are all dicots, which have two cotyledons in their seeds, branching veins in their leaves, and taproot systems.

Question 17

Which association is correct?

Accepted Answer

Guard cells are specialized cells found in the epidermis of leaves and stems. They control the opening and closing of stomata, which are pores in the epidermis that regulate gas exchange and transpiration.

Question 18

An aphid is an insect that has mouthparts to sip plant sap. When placed on an herbaceous stem, it soon has its mouthparts embedded and is withdrawing plant sap. What layer of cells has the aphid's mouthparts tapped?

Accepted Answer

The aphid's mouthparts are adapted to tap into the phloem, the layer of cells responsible for transporting sugars and other nutrients in plants.

Question 19

A cross section through the zone of maturation of a root would show

Accepted Answer

The zone of maturation in a root is where cells differentiate into various specialized cells, including transport tissues like xylem and phloem, which are responsible for the transport of water, nutrients, and sugars throughout the plant.

Question 20

Root hairs are found in which area of the root?

Accepted Answer

Root hairs, which are extensions of root epidermal cells, are found in the zone of maturation where they help in the absorption of water and nutrients.

Quiz 9: Plant Organization and Function