Root, Stem, Leaf

Multiple Choice

Which of the following best describes a root?

• Roots are the primary site of photosynthesis.

• Roots give rise to new leaves and flowers.

• Roots have a thick cuticle to protect the epidermis.

• Roots absorb water and nutrients.

Multiple Choice

Why are root hairs important to plants?

• Root hairs anchor a plant into the soil.

• Root hairs store starches.

• Root hairs increase the surface area for absorption.

• Root hairs provide habitat for nitrogen-fixing bacteria.

Multiple Choice

What is the layer that covers the apical meristem of a root?

• Root cap

• Zone of Cell Division

• Zone of Elongation

• Zone of maturation

Multiple Choice

Lateral roots originate in which of the following?

• Lateral meristems

• Pericycle

• Cortex

• Endodermis

Multiple Choice

The nutrition of some plants is enhanced by a mutually beneficial interaction between a root and soil bacteria. This interaction triggers the formation of which of the following?

• Nodules

• Haustoria

• Mycorrhiza

• Hypha

Multiple Choice

Which example below is the site of primary growth that results in the plant’s increase in height?

• Apical meristems

• Bud scales

• Nodes

• Lateral meristems

Multiple Choice

Some plants grow by primary and secondary mechanisms. Choose the correct description of a mechanism and its result.

• Primary growth increases the girth of the plant.

• Primary and secondary growth are required to produce woody plants.

• Stems that only experience primary growth are called woody plants.

• Secondary growth, a feature of herbaceous plants, extends the length of the plant.

Multiple Choice

Which of the following correctly describes a feature unique to monocot stems?

• Ground tissue consists mainly of parenchyma cells.

• Vascular tissue is located all in the center.

• Vascular bundles are arranged in a ring.

• Vascular bundles are scattered throughout the stem.

Multiple Choice

Which of these is a stem?

• Carrot

• Ginger

• Pneumatophore

• Spines of cactus

Multiple Choice

Which of the following is the main function of leaves?

• Transport water

• Support the weight of the plant

• Transport sugar

• Absorb sunlight

Multiple Choice

The very top of the leaf has a thin coated waxy surface. What is the name of this leaf part?

• Cuticle

• Stomata

• Spongy mesophyll

• Palisade mesophyll

Multiple Choice

Microscopic openings in the leaf regulate the gas exchange of carbon dioxide and oxygen. They also allow transpiration of the leaf to occur. What is this opening called?

• Cuticle

• Stomata

• Spongy mesophyll

• Palisade mesophyll

Multiple Choice

In which part of the leaf are chloroplasts most abundant?

• Vascular bundle

• Mesophyll

• Epidermal layer

• Guard cells

Multiple Choice

What is the behavior of water during transpiration?

• Water evaporates directly from the root surface.

• Water flows from leaf veins through the stem, toward the roots.

• Water exits the leaf through stomata, pulling water into the leaf from leaf veins.

• Water exits xylem in leaf veins and enters phloem by osmosis.