Biology
     
 
                 

The Plant Kingdom

          
                 
         
                 
 

The seed-forming plants:

A seed is a fertilized ovule (part of the plant ovary). It is a multicellular structure containing an embryo plant and its food. Seeds can survive long periods of inactivity between their formation and activation. Today, seed plants are the most successful plants on Earth.

Seed plants are broken into two groups based on how their seeds are formed:

  
                           
   
Gymnosperms: plants that produce "naked" seeds.

• Gymnosperm seeds are protected by a "cone".
• Pollen cones (male) produce pollen.
• Seed cones (female) produce the seed.
• There are about 700 species of gymnosperms.
Angiosperms: plants that produce seeds enclosed in a fruit.

Is this a Monocot or Dicot?

• Class Monocotyledoneae:

• Monocots have one cotyledon, or "seed leaf".
• About 90,000 species are known.

• Class Dicotyledoneae:

• The embryo plant of a dicot has two seed leaves.
• About 185,000 species are known.


Monocots and dicots are easily distinguished by their physical characteristics.

     
                           
    Insert monocot/dicot table from botany      
                           
     

EOI Question #9

This picture shows an angiosperm structure. Which of these gymnosperm structures has a similar function?

A. Pine needle
B. Pine root
C. Pinecone
D. Pine seed

        
                           

EOI Question #26

Which of these leaves belongs to a Monocot?

A. 1
B. 2
C. 3
D. 4

    
 
                           
       

Answer the following questions. Head your paper:

Unit 12 Day 2 Plant Kindom

1. Is a pecan a monocot or a dicot? (give the reason for your answer)
2. What is the structure that surrounds the seeds of Angiosperms?
3. How do the flower part numbers compare between monocots and dicots?
4. How are the leaves of monocots different from those of dicots?

    
                           
 
     

 

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