Anatomy of Root, Stem and Leaves

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 elongation

• Zone of cell division

• Zone of maturation

Multiple Choice

Which of the following do lateral roots emerge from?

• Epidermis

• Cortex

• Pericycle

• Endodermis

Multiple Choice

Which of the following is formed when the nutrition of some plants is enhanced by a mutually beneficial interaction between a root and soil bacteria?

• Nodules

• Mycorrhiza

• Haustoria

• Hypha

Multiple Choice

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

• Apical meristems

• Nodes

• Bud Scales

• Lateral meristem

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.

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

• Primary and secondary growth are required to produce 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 bundles are arranged in a ring.

• Vascular tissue is located all in the center.

• Vascular bundles are scattered throughout the stem.

Multiple Choice

Which of these is a stem?

• Carrot

• Pneumatophore

• Ginger

• 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

• Epidermal layer

• Mesophyll

• Guard cells