Structures, Processes, and Responses of Plants

Structures, Processes, and Responses of Plants 6-2 The student will demonstrate an understanding of structures, processes, and responses of plants that allow them to survive and reproduce. (Life Science)

6.2.4 Summarize the basic functions of the structures of a flowering plant for defense, survival, and reproduction. Taxonomy level: 2.4-B Understand Conceptual Knowledge Essential Question: What are some of the structures plants use for defense, survival, and reproduction?______

______

______It is essential for students to know that flowering plants have special structures that function for defense, survival, and reproduction. Structures for Defense Plants have structures for defense that protect them from threats and without these defenses the plant might die. Examples of natural defenses that plants have developed over time may be

 ______that can defend the plant from being eaten by some animals or destroyed when stepped upon.

 fruits and leaves with______so that they are not eaten by animals.

 the ability to ______its leaves when touched

(______). Structures for Survival Plants have structures that allow them to survive in their habitats when the conditions are not suitable. Examples of parts of flowering plants that function for survival may be:

 ______function as the site of photosynthesis, respiration, and transpiration in plants.

 ______support the plant and hold the leaves up to the light. Stems also

function as ______sites.

o The ______in the stems transports ______from the roots to the leaves and other plant parts.

Effective August 2007 Structures, Processes, and Responses of Plants 6-2 The student will demonstrate an understanding of structures, processes, and responses of plants that allow them to survive and reproduce. (Life Science)

o The ______in the stems transport ______made in the leaves to growing parts of the plant.

 ______help anchor the plant in the ground.

o They also absorb ______and ______from the soil and store extra food for the plants.

o The more ______on the root that is available, the more water and nutrients it can absorb.

o ______help to increase this surface area.

 There are ______types of roots: fibrous roots and taproots.

o ______consist of several main roots that branch off to form a mass of roots. Examples are grass, corn, and some trees. Draw the fibrous root plant.

o ______consist of one large, main root with smaller roots branching off. Examples are carrots, dandelions, or cacti. Draw the taproot plant.

 ______have special structures that allow them to be dispersed by wind, water, or animals.

 The seeds ______helps ______the embryo from injury and also from drying out.

End of part one Questions to complete for homework.

1. How do thorns protect a blackberry bush?

2. If some household and landscaping plants are poisonous, why do people continue to plant them?

3. If plant leaves are so important for survival, then how do plants that lose their leaves in the winter survive?

4. Why are stems important parts of a plant?

5. What systems in your body act like the stem of a plant?

Define key terms.

1. thigmotropism

2. taproot

3. fibrous root

Structures for Reproduction Parts of the flowering plant that function in reproduction include: Flowers  Flowers produce ______.

 Many flowers contain both ______and ______parts needed to produce new flowers.

 Flower petals are often ______or have a ______to attract insects and other animals.

Stamen (the male flower part)  The male part of a flower that has an ______on a stalk (filament).

 The ______produces the ______that contains the sperm cells.

Draw and label the male parts of the flower.

Pistil (the female flower part)

 The female part of the flower that contains

o The ______, which contains the ovules where the ______cells are produced.

o The ______, which is the ______top where pollen grains land.

o The______, which is a stalk down which the pollen tube grows after pollination has taken place.

Draw and label the female parts of the flower.

Seed  The ovule that contains the ______(embryo) from which new plants are formed.

 A ______that is formed from the ovary often protects them.

Complete the essential question.

Define key terms. 1. stamen

2. pistil

3. pollen

4. ovary

5. seed

6. anther

7. fruit

8. style

9. stigma

Questions to complete for homework.

1. Identify the male reproductive parts of a flower. Include the overall name.

2. Identify the female reproductive parts of the flower. Include the overall name.

3. Why is it important that the stigma be sticky?

4. Once the pollen is on the stamen, what happens to it? Use your vocabulary.

5. What would attract another organism to a flower and why?

Assessment Guidelines: The objective of this indicator is to summarize the basic functions of the structures of flowering plants; therefore, the primary focus of assessment should be to generalize points about the various structures needed for defense, survival, and reproduction. However, appropriate assessments should also require student to identify the parts of a flower used for reproduction;

Effective August 2007 Structures, Processes, and Responses of Plants 6-2 The student will demonstrate an understanding of structures, processes, and responses of plants that allow them to survive and reproduce. (Life Science) identify structures in plants used for defense, survival, or reproduction; illustrate a flower or plant structures using words, pictures, or diagrams; or classify a structure based on its function for defense, survival, or reproduction.

Effective August 2007