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Презентация Algae
Материал туралы қысқаша түсінік
Барлық мұғалімдерге,студенттерге,оқушыларға арналған.
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Толығырақ
05 Мамыр 2021
329
0 рет жүктелгенТегін турнир Мұғалімдер мен Тәрбиешілерге
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Материалдың қысқаша түсінігі
1 слайд
Algae are a diverse group of
aquatic organisms that have the
ability to conduct photosynthesis.
Certain algae are familiar to most
people; for instance, seaweeds
(such as kelp or phytoplankton),
pond scum or the algal blooms in
lakes. However, there exists a vast
and varied world of algae that are
not only helpful to us, but are
critical to our existence.
1 слайд
Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis. Certain algae are familiar to most people; for instance, seaweeds (such as kelp or phytoplankton), pond scum or the algal blooms in lakes. However, there exists a vast and varied world of algae that are not only helpful to us, but are critical to our existence.
2 слайд
Definition
The term "algae" covers many different
organisms capable of producing
oxygen through photosynthesis (the
process of harvesting light energy from
the sun to generate carbohydrates).
These organisms are not necessarily
closely related. However, certain
features unite them, while
distinguishing them from the other
major group of photosynthetic
organisms: the land plants.
2 слайд
Definition The term "algae" covers many different organisms capable of producing oxygen through photosynthesis (the process of harvesting light energy from the sun to generate carbohydrates). These organisms are not necessarily closely related. However, certain features unite them, while distinguishing them from the other major group of photosynthetic organisms: the land plants.
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Reproduction
Algae are capable of reproducing through asexual or
vegetative methods and via sexual reproduction.
According to the authors of "Algae," asexual
reproduction involves the production of a motile
spore, while vegetative methods include simple cell
division ( mitosis ) to produce identical offspring and
the fragmentation of a colony. Sexual reproduction
involves the union of gametes (produced individually
in each parent through meiosis ).
3 слайд
Reproduction Algae are capable of reproducing through asexual or vegetative methods and via sexual reproduction. According to the authors of "Algae," asexual reproduction involves the production of a motile spore, while vegetative methods include simple cell division ( mitosis ) to produce identical offspring and the fragmentation of a colony. Sexual reproduction involves the union of gametes (produced individually in each parent through meiosis ).
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Classification
Cyanobacteria
These are also referred to as blue-green
algae. Though they are capable of
conducting oxygen-producing
photosynthesis and live in many of the
same environments as eukaryotic algae,
cyanobacteria are gram-negative bacteria ,
and therefore are prokaryotes. They are
also capable of independently conducting
nitrogen fixation, the process of converting
atmospheric nitrogen to usable forms of
the element such as ammonia.
5 слайд
Classification Cyanobacteria These are also referred to as blue-green algae. Though they are capable of conducting oxygen-producing photosynthesis and live in many of the same environments as eukaryotic algae, cyanobacteria are gram-negative bacteria , and therefore are prokaryotes. They are also capable of independently conducting nitrogen fixation, the process of converting atmospheric nitrogen to usable forms of the element such as ammonia.
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Eukaryotic algae
The eukaryotic algae are polyphyletic , meaning that
they did not evolve from a single common ancestor.
This is clearly demonstrated in our current
understanding of the tree of life — a family tree of all
living organisms organized by their various
evolutionary relationships. Eukaryotic algae are found
distributed among many different groups, or major
branches of the tree.
6 слайд
Eukaryotic algae The eukaryotic algae are polyphyletic , meaning that they did not evolve from a single common ancestor. This is clearly demonstrated in our current understanding of the tree of life — a family tree of all living organisms organized by their various evolutionary relationships. Eukaryotic algae are found distributed among many different groups, or major branches of the tree.
