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PLANT GROWTH WEBQUEST - Chapter 24

Go to the following website

Click on the Primary Growth, Secondary Growth, and Cork cambium to learn about how a plant grows.

INTRODUCTION

  1. What are meristems?
  1. Differentiate between apical and lateral meristems.
  1. Describe the function of each type of lateral meristem.

PRIMARY GROWTH

  1. What is primary growth?
  1. What produces new root and shoot cells allowing for vertical growth?
  1. Although not discussed in the website (but discussed in class), answer the following:
  2. How many layers thick is the epidermis (dermal tissue)?
  3. What type of ground tissue is closest to the dermis?
  4. What type of ground tissue is the “typical” plant cell?
  5. What type of ground tissue surrounds and supports the vascular tissue?
  1. What is secondary growth and why does it occur?

SECONDARY GROWTH

  1. Using colored pencils, draw a simplified cross section, just drawing rings within rings, showing the following: epidermis, cortex, xylem, phloem, vascular cambium, pith.
  1. What is the layer of cells between the xylem of phloem called?
  2. Why is the vascular cambium consider a lateral meristem?
  1. When cells of the vascular cambium divide, the new cells that form on the inside are called ______and the new cells on the outside are called ______.
  1. Using colored pencils, draw a simplified cross section, just drawing rings within rings, showing the following: epidermis, cortex, primary xylem, secondary xylem, primary phloem, secondary phloem, vascular cambium, pith.

CORK CAMBIUM

  1. Does the division o the vascular cambium increase the length or thickness of the plant stem?
  1. Where does the cork cambium develop? What type of tissue makes up this area (we learned this before)?
  1. How do you know that in a diagram, that 2 years of growth have been completed?
  1. As the plant increases in girth, the outer layers of the stem are lost. What layers are lost and why?
  1. As outer layers are lost due to growth in girth, what will be produced?
  1. In a 5 year old tree, there would be ____ (a number) layers of ______. This is how we can determine the age of a tree.

MISCELLANEOUS

What layers make up the:

Bark:

Wood:

In order for you to see what is actually considered cork, bark, and wood draw a cross section of a plant in year 2. Label the primary xylem, secondary phloem, pith, cortex, vascular cambium, cork cambium, bark, wood, cork, secondary xylem.

Now go a step further and read in your book or research:

  1. What is heartwood?
  1. What is sapwood?
  1. Using colored pencils, draw a simplified cross section, just drawing rings within rings, showing the following: vascular cambium, phloem, heartwood, sapwood, cork
  1. Is the phloem you drew in step 3 primary or secondary phloem?

Identify the following pictures as either a MONOCOT or a DICOT. Explain why it is considered such.

Identify the following pictures as either a MONOCOT or a DICOT. Explain why…..THERE ARE 3 REASONS you should include in your answer.

Label the diagrams below as a monocot or dicot stem. Label the following on the monocot: xylem, phloem, and epidermis. Label the following on the dicot: xylem, phloem, cortex, epidermis, and pith, vascular cambium

Label the following as either a monocot or dicot root. Label the epidermis, endodermis, vascular tissue, xylem, phloem, pith, and cortex. Some terms may be used in one pic but not the other.