Class 11th – Protozoans – Sarcodina | Biological Classification | Tutorials Point
Summary
TLDRThis tutorial video introduces Sarcodina, a group of protozoans also known as amoeboid protozoans. Characterized by their amoeba-like cells, they can be uni- or multi-nucleated and are commonly found in freshwater or marine environments. Sarcodina are endoparasites and pathogenic, relying on host organisms for nutrition. They move and capture food using pseudopodia or 'false feet.' They reproduce sexually through binary or multiple fission, and sometimes through syngamy, where two cells fuse to form a diploid zygote.
Takeaways
- 🐠 Sarcodina, also known as amoebae-like protozoans, are characterized by their amoeboid cells.
- 🌿 These protozoans can be either uni-nucleate or multi-nucleate.
- 💧 Sarcodina are commonly found in freshwater environments, and some species exist in marine environments.
- 🐛 They are endoparasites, relying on host organisms for nutrition and residing inside their bodies or cells.
- 🚫 Sarcodina are pathogenic, meaning they can cause harm to their host organisms.
- 🦶 The locomotory organ of Sarcodina is called pseudopodia, also known as false feet.
- 🍽️ Pseudopodia aid in both locomotion and capturing food by engulfing particles.
- 🌱 Sarcodina are heterotrophic, lacking photosynthetic pigments like chlorophyll, and thus cannot produce their own food.
- 🍖 They have a predatory feeding habit, similar to animals, consuming food whole.
- 🔗 The primary mode of reproduction for Sarcodina is sexual reproduction, which can occur through binary or multiple fission.
- 🤝 Sexual reproduction can also occur through the process of syngamy, where two cells fuse to form a diploid zygote.
Q & A
What is the second group of protozoans discussed in the video?
-The second group of protozoans discussed in the video is called Sarcodina.
Why are Sarcodina also known as amoebae-like protozoans?
-Sarcodina are also known as amoebae-like protozoans because they share characteristics with amoebae, including their amoeba-like cells.
What are the two types of nuclei that Sarcodina can have?
-Sarcodina can be either uninucleate, meaning they have a single nucleus, or multinucleated, meaning they have multiple nuclei.
Where are Sarcodina commonly found?
-Sarcodina are commonly found in freshwater environments, but some types can also be found in marine environments.
What does it mean for Sarcodina to be endoparasites?
-Being endoparasites means that Sarcodina are dependent on host organisms for nutrition and reside inside the body or cells of these hosts.
How do Sarcodina move and capture food?
-Sarcodina move and capture food using pseudopodia, also known as false feet, which are extensions of the cell's protoplasm.
Can you describe the process of how pseudopodia capture food?
-Pseudopodia capture food by growing out and engulfing food particles, eventually bringing them inside the organism's body.
What type of nutrition do Sarcodina have?
-Sarcodina have heterotrophic nutrition, meaning they cannot make their own food and must consume other organisms for sustenance.
What is the mode of reproduction for Sarcodina?
-The mode of reproduction for Sarcodina is mostly sexual reproduction, which can occur through binary fission or multiple fission.
What is binary fission and how does it differ from multiple fission?
-Binary fission is a type of asexual reproduction where a parent cell divides into two equal daughter cells. Multiple fission results in more than two cells being formed from a single parent cell.
Is there a sexual reproduction process mentioned for Sarcodina?
-Yes, sexual reproduction can occur through the process of syngamy, where two cells fuse together to form a diploid zygote.
Outlines
🐛 Introduction to Sarcodina
This paragraph introduces Sarcodina, the second group of protozoans, following the discussion of the first group, the Zooflagellates. Sarcodina, also known as amoeboid protozoans, are characterized by their amoeba-like cells. They can be either uni-nucleate or multi-nucleated and are commonly found in freshwater environments, although some species exist in marine environments. These protozoans are endoparasites, relying on host organisms for nutrition and often residing inside their host's body or cells. They are also pathogenic, meaning they can cause harm to their host. The locomotory organ of Sarcodina is the pseudopodia or false feet, which aids in movement and capturing food. The pseudopodia extend from the cell and engulf food particles. Sarcodina are heterotrophic, lacking photosynthetic pigments like chlorophyll, and reproduce sexually through binary or multiple fission. Sexual reproduction can also occur through the process of syngamy, where two cells fuse to form a diploid zygote.
Mindmap
Keywords
💡Protozoans
💡Sarcodines
💡Amoeboid
💡Pseudopodia
💡Uni-nucleate
💡Multi-nucleated
💡Endoparasites
💡Pathogenic
💡Heterotrophic
💡Binary Fission
💡Multiple Fission
💡Sexual Reproduction
Highlights
Introduction to the second group of protozoans, Sarco Deena.
Sarco Deena are also known as amoeba-like protozoans.
They can be either uni-nucleate or multi-nucleated.
Mostly found in freshwater environments.
Some types can also be found in marine environments.
Sarco Deena are endoparasites, dependent on host organisms for nutrition.
They are pathogenic and can harm their host organisms.
Pseudopodia, or false feet, are their locomotory organs.
Pseudopodia help in locomotion and capturing food.
They engulf food particles by extending pseudopodia.
Sarco Deena are heterotrophic, lacking photosynthetic pigments like chlorophyll.
They have animal-like feeding habits, taking in food as a whole.
Sexual reproduction can occur by binary fission.
Binary fission involves equal division of cytoplasmic content into two daughter cells.
Multiple fission results in numerous cells from a single parent cell.
Sexual reproduction can also occur through the process of syngamy.
Syngamy involves the fusion of two cells to form a diploid zygote.
Summary of Sarco Deena characteristics and reproduction methods.
Transcripts
hello everyone welcome to tutorials
point in this video we are going to talk
about the second group of protozoans
which are termed as circa Deena before
this we have talked about the first
group which has been termed as the zoo
flageolets and we have seen that they
have the presence of a locomotory organ
which is the flagella now let's see what
are these Sarco Deena Sarco Deena they
are also termed as the amoeba Pluto's
ones because of the fact that they have
characteristics or mostly they are like
amoeba so their amoeba like cells hence
they are also called as amoeboid proto
swans they can be uni nucleate or they
can also be multinucleated they are
mostly found in freshwater or they and
some of the some of the types of these
type of SAR cadena they can also be
found in the marine type of environments
they are endoparasites which means they
are dependent on some host organisms for
the nutrition and they mostly reside
inside the body or inside the cells of
these type of host organisms and they
are also pathogenic which means they can
harm the host in which they are actually
residing the locomotory organ here is
pseudopodia or false feet let's see our
pseudopodia looks like so suppose if
this is a cell now this the protoplasm
of the cell
it shows some outgrowth like this so
these two are basically these extensions
are basically the pseudopodia now this
pseudopodia they are also called as
false feet pseudopodia obviously their
help in locomotion and in addition to
that they also help in capturing of food
how suppose if this is a cell and in the
environment there is a food materials if
this is the food particle so what
happened this pseudopodia it grows out
and it actually engulfs the food
material and slowly and steadily it
engulfs it and exit within the body of
the organism
so this pseudopodia are false feet they
help in locomotion in
- that they help in capturing of food
they are heterotrophic in nutrition
which means they cannot make their own
food because of a simple fact that they
do not have photosynthetic pigments like
chlorophyll and there they can also be
hollow soybean nutrition like feeding
habits like those of animals they take
in food as a whole so they are pelagic
in nutrition the mode of reproduction is
mostly a sexual reproduction which can
happen by binary fission or multiple
fission we know what is binary fission
here the parent cell it equally divides
into two daughter cells the cytoplasmic
content is equally divided into these
two new daughter cells whereas what is
multiple fission multiple fission means
that from a single parent num numerous
amounts of cells will be formed it's
more than two so this is known as
multiple fission here some sort of
sexual reproduction also can occur by
the process of sin gamma now what is sin
gammy Singam is nothing but two cells
fuse together and it forms a diploid
zygote so it can also reproduce sexually
so in this video we have talked about a
group of protists ones which are known
as psycho Deena why are they called so
because of the because they are amoeboid
type of cells and they have a presence
of locomotory of organ which is known as
false feet are also as pseudopodia I
hope you have understood and like this
video thank you
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