Algas
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![Page 1: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/1.jpg)
![Page 2: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/2.jpg)
CARACTERÍSTICAS
•Poden ser unicelulares ou pluricelulares. As
unicelulares, ás veces, forman colonias.
•Nas pluricelulares, as células non forman tecidos.
•Son autótrofas.
•Acuáticas
•Segundo sexa a abundancia de pigmentos ,
clasifícanse en:
ALGAS VERDES
ALGAS PARDAS
ALGAS VERMELLAS
![Page 3: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/3.jpg)
Todas estas algas son unicelulares e forman parte do fitoplancton
Diatomeas
Diatomeas
Microscopio electrónico
![Page 4: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/4.jpg)
•O pigmento máis abundante é a clorofila.
•Hainas unicelulares como a Euglena, ou pluricelulares como a leituga de mar.
•Atópanse nas augas doces e salgadas.
EUGLENA
ULVA LACTUCA
![Page 5: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/5.jpg)
![Page 6: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/6.jpg)
CARACTERÍSTICAS
•Pigmento amarelado.
•Son mariñas
•Hainas unicelulares, como as dinoflaxeladas
( causantes da marea vermella), e pluricelulares, como o Fucus
FUCUS
Fucus spiraus
Ceratium hirundinella
![Page 7: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/7.jpg)
Feofíceas (algas pardas)
![Page 8: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/8.jpg)
Exemplos de algas pardas
![Page 9: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/9.jpg)
Mancha de algas pardas en mar e praia
![Page 10: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/10.jpg)
CARACTERÍSTICAS
•Son pluricelulares•Viven no mar. •Levan, ademais de clorofila, outros pigmentos, a ficoeritrina e ficocianina. •As súas células conteñen, ademais, bromo e iodo.
•As algas vermellas poden formar unha parede de carbonato cálcico, e teñen importancia na formación de arrecifes de coral..
![Page 11: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/11.jpg)
Rodophyta (Algas VERMELLAS ou rodofíceas)
![Page 14: Algas](https://reader033.fdocuments.mx/reader033/viewer/2022061302/5490f86bb4795932688b46b3/html5/thumbnails/14.jpg)