22.1 Plant Life Cycles TEKS 10B

22.1 Plant Life Cycles TEKS 10B

Bell Ringer


KEY CONCEPT

1. All plants alternate between two phases in their life

cycles.

2. Reproduction of flowering plants takes place within

flowers.

3. Seeds disperse and begin to grow when conditions

are favorable.

4. Plant hormones guide plant growth and development.


Words to Learn;

1. Alternation of

Generation

2. Sporophyte

3. Gametophyte

4. Gymnosperm

5. Angiosperm

6. Sepal

7. Petal

8. Carpel/Pistil

9. Ovary

10. Stamen

11. Germination

12. Tropism

13. Phototropism

14. Thigmotropism

15. Gravitropism

16. Hydrotropism

17. Hormone


Alternation of Generations

• life cycle, which

alternates between

diploid and haploid

phases,


Sporophyte

• And algae that have

alternation of

generation, the

diploid individual or

generation that

produces haploid

spores


Gametophyte

• In alternation of

generations, the

phase which

gametes are formed;

a haploid individual

that produces

gametes.


angiosperm

•is a seed plant

that has seeds

enclosed in some

type of fruit.


Seeds allow plants to disperse to new places.

conegymnosperm

• is a seed plant whose

seeds are not enclosed

in fruit

• is the reproductive structure of most

gymnosperms.

• It contains hard protective scales.


• Sepal; are

modified leaves

that protect the

developing

flower.

• Petal; The layer

just inside the

sepals

• Stamen; is the

male structure of

a flower

Flowers contain reproductive organs protected by

specialized leaves.


• Carpel/Pistil; The

innermost layer of

a flower is made

up of the female

structure

• Ovary; Where the

female

gametophytes are

produced, found at

the base of a

flower.

Flowers contain reproductive organs protected by

specialized leaves.


Germinationthe embryo breaks out of the seed coat and begins to grow

into a seedling,


Hormones

is a chemical messenger produced in one part of an organism

that stimulates or suppresses the activity of cells in another

part.•Examples of plant hormones

include;

• Ethylene; causes ripening of is

naturally produced by fruits.

• Gibberellin; produces a dramatic

increase in size.

• Auxin; are plant hormones

involved in the lengthening of

plant cells produced in the

apical meristem, or growing tip.


Plants can respond to

light, touch, gravity, and

seasonal changes.


Tropism

the movement of a plant in

response to an environmental

stimulus.


Hydrotropism

the growth or turning of

plant roots toward or

away from moisture.


Phototropism

tendency of a plant to grow toward light


Thigmotropism

• plants also have

a response to

touch


Gravitropism

• plants also have

a response to

Earth's

gravitational pull.


Asynchronous Assignment

• Face to Face Instruction Survey

• Assignment on Virtual Class Notebook,

– Homework tab.

– Page title “Parts of the Flower”

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22.1 Plant Life Cycles TEKS 10B

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