The document summarizes key information about the protist kingdom. It defines protists as eukaryotic organisms that are neither plants, animals, nor fungi. Protists exhibit diverse characteristics including unicellular or multicellular forms, modes of nutrition, and mechanisms of locomotion. The document categorizes major protist groups such as protozoans, algae, and slime molds. It provides examples and descriptions of important protist taxa to illustrate the diversity within the kingdom.
are worm-like parasites. The clinically relevant groups are separated according to their general external shape and the host organ they inhabit. There are both hermaphroditic and bisexual species.
The definitive classification is based on the external and internal morphology of egg, larval, and adult stages.
Helminth is a general term meaning worm. The helminths are invertebrates characterized by elongated, flat or round bodies.
In flatworms or platyhelminths (platy from the Greek root meaning “flat”) include flukes and tapeworms.
Roundworms are nematodes (nemato from the Greek root meaning “thread”).
Fungus comes from the Greek word mykes “Mushrooms”
They are Eukaryotic organism that digests food externally and absorbs nutrients directly through its cell walls. Consist of about 100,000 spp.
are worm-like parasites. The clinically relevant groups are separated according to their general external shape and the host organ they inhabit. There are both hermaphroditic and bisexual species.
The definitive classification is based on the external and internal morphology of egg, larval, and adult stages.
Helminth is a general term meaning worm. The helminths are invertebrates characterized by elongated, flat or round bodies.
In flatworms or platyhelminths (platy from the Greek root meaning “flat”) include flukes and tapeworms.
Roundworms are nematodes (nemato from the Greek root meaning “thread”).
Fungus comes from the Greek word mykes “Mushrooms”
They are Eukaryotic organism that digests food externally and absorbs nutrients directly through its cell walls. Consist of about 100,000 spp.
Introduction of algae and general characteristics
Fossil history of algae
Endosymbiosis Theory
Where are algae abound? Ecology
Algal Blooms
Eutrophication
How are algae similar to higher plants?
How are algae different from higher plants?
Variations in the pigment constitution
Prokaryotic vs eukaryotic algae...............
Presentation
BEST OF LUCK
Sponges,are pore bearing,multicellular,diploblastic animals that belong to phylum Porifera
Body of all sponges is perforated by large number of pores called ostia through which water enters Inside body and flows through a system of criss-crossing canals known as canal system
Three main types of canal systems in the order of increasing complexity are Asconoid, Syconoid and Leuconoid type.
Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments. All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria - the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae.
This ppt features the different kinds of protozoa, an animal-like protist . They are animal-like because they are heterotrophs, and are capable of moving.
Biological Classification
This ppt shows the details of biological classification. it gives a brief idea about the five kingdom classification with a detailed description of kingdoms monera, protista and fungi. a detailed description of viruses, viroids, prions and lichens have also been given....
For more details visit my youtube channel: (VIHIRA ACADEMY)
https://www.youtube.com/channel/UCxo06Nj-QWo_7SNvMyDnJCQ?view_as=subscriber
Introduction of algae and general characteristics
Fossil history of algae
Endosymbiosis Theory
Where are algae abound? Ecology
Algal Blooms
Eutrophication
How are algae similar to higher plants?
How are algae different from higher plants?
Variations in the pigment constitution
Prokaryotic vs eukaryotic algae...............
Presentation
BEST OF LUCK
Sponges,are pore bearing,multicellular,diploblastic animals that belong to phylum Porifera
Body of all sponges is perforated by large number of pores called ostia through which water enters Inside body and flows through a system of criss-crossing canals known as canal system
Three main types of canal systems in the order of increasing complexity are Asconoid, Syconoid and Leuconoid type.
Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments. All cnidarians have radial symmetrical. There are two major body forms among the Cnidaria - the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae.
This ppt features the different kinds of protozoa, an animal-like protist . They are animal-like because they are heterotrophs, and are capable of moving.
Biological Classification
This ppt shows the details of biological classification. it gives a brief idea about the five kingdom classification with a detailed description of kingdoms monera, protista and fungi. a detailed description of viruses, viroids, prions and lichens have also been given....
For more details visit my youtube channel: (VIHIRA ACADEMY)
https://www.youtube.com/channel/UCxo06Nj-QWo_7SNvMyDnJCQ?view_as=subscriber
A presentation for BSC biology semester 1 students. This rich presentation is about major phylum in animal kingdom, each phylum is explained in detail with their general characterstics. Can be used for presenting in college or school, teaching, learning, etc.
Microbiology - Algae
Algae is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades.
Algae are sometimes considered plants and sometimes considered "protists" (a grab-bag category of generally distantly related organisms that are grouped on the basis of not being animals, plants, fungi, bacteria, or archaeans).
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
1. Kingdom Protista
This content is only for education purpose
Dr. Poonam Bansal
Assistant Professor
Maharishi Markandeshwar (Deemed to Be University)
Mullana
2. The classification of five kingdoms was given by Robert Whittaker in 1969, and the
Protista kingdom was a part of those five kingdoms.
The term ‘Protista’ is derived from the Greek word “protistos”, meaning “the very first”.
Simple eukaryotic organisms that are neither plants nor animals or fungi.
They are unicellular in nature but can also be found as a colony of cells.
Mostly live in water, damp terrestrial environments, or even as parasites.
Cell of these organisms contain a nucleus which is bound to the organelles.
Some of them even possess structures that aid locomotion like flagella or cilia.
Protista
3. Salient Features
The kingdom of Protista is a diversified one, it is difficult to coherently characterize them in a
simplified manner. The organisms that form a part of this kingdom are diverse and multifarious in
terms of bodily structure, reproductive abilities, and nutrition.
The characteristics of Protista are as fellow:
Some may be unicellular, others may be colonial or multicellular.
Protists are a part of eukaryotic kingdoms, their organizational structure can be varied.
They have multiple organelles that include a nucleus, mitochondria, plastids, food vacuoles and
flagella.
They are capable of both sexual and asexual reproduction.
Protists are free-living organisms, but they are also capable of living interdependently with another
organism.
4. Symbiosis is observed in the members of this class. The relationship between a protist and another
organism is either a collaborative one or a parasitic one. In a collaborative relationship, both of them
benefit from each other, whereas in a parasitic relationship, the protist is deriving the benefit by
feeding off the host. For example kelp (seaweed) is a multicellular protist that provides otters,
protection from predators amidst its thick kelp. In turn, the otters eat sea urchins that tend to feed on
kelp
Usually, there are two different sides to protists - one side is beneficial to humans, while the other side
harms them in the form of dangerous, life-threatening diseases.
Protists have the dual characteristics of both mobility and immobility. While some protists are
ambulatory as they use cilia, flagella, and pseudopodia as fake feet to commute, while others are
stationary as well.
They can be both autotrophic (preparing their own food) and heterotrophic (acquiring outside sources
of nutrition). For example, Euglena performs mixotrophic nutrition as both holotropic (where the
organism captures and ingests the food) and saprotrophic (where the organism releases enzymes that
convert organic matter into simpler products) modes of nutrition can be observed in them.
5. Classification of Protista
The classification of protists is done on the basis of their nutritional habits, mobility
and modes of reproduction. They can be broadly classified into three categories:
Protozoan protists
Photosynthetic protists or Protist algae
Slime moulds
6. Photosynthetic Protists or Protist Algae
•Photosynthetic protists are eukaryotic organism that mainly contains
chloroplast and prepare their own food.
•These are unicellular and possess flagella for movement.
•Most have mitochondria.
•They can be parasites.
•They all prefer aquatic or moist environments.
•They also contain chlorophyll, a pigment which absorbs light energy
for photosynthesis. Photosynthetic protists are considered plant-like
protists.
•Protists that are capable of photosynthesis include various types of
algae, chrysophytes, dinoflagellates and euglena.
•Reproduction is entirely asexual.
7. • Dinoflagellates one-celled aquatic organisms and having
characteristics of both plants and animals.
• Nutrition among dinoflagellates is autotrophic, heterotrophic or
mixed; some species are parasitic or commensal.
• Dinoflagellates range in size from about 5 to 2,000 micrometres
(0.0002 to 0.08 inch).
• Dinoflagellates possess two flagella, one (the transverse
flagellum) may be contained in a groove-like structure around the
equator of the organism (the cingulum), providing forward
motion and spin to the dinoflagellate, the other (the longitudinal
flagellum) trailing behind providing little propulsive force,
mainly acting as a rudder.
• Some of the examples of dinoflagellates are Glenodinium,
Peridinium, Gymnodinium, Ceratium etc.
Symbiodinium sp. (Dinophyceae):
Dinoflagellates
8. Chrysophytes
Chrysophytes (Chrysophyceae, Heterokontophyta) are mainly
unicellular or colonial golden-brown algae, which may be flagellate,
but there are also some multicellular species
They are sometimes referred to as golden-brown algae due to their
coloration from specific photosynthetic pigments.
They are not considered truly autotrophic by some biologists because
nearly all chrysophytes become facultatively heterotrophic in the
absence of adequate light, or in the presence of plentiful dissolved
food.
Contain chlorophyll, xenthophyll.
Rigid cell wall made of pectin/silica/cellulose.
Include diatoms and desmids. Some of the examples are Navicula,
Cymbella, etc.
Golden brown algae
9. Euglenoids are either unicellular or colonial.
About 2/3 of these are heterotrophic and have colorless plastid.
Are able to photosynthesize, and have green plastids with
chlorophyll a and b and carotenoid pigments.
The cytoplasm of Euglena and other euglenoids contains many
paramylon starch storage granules.
Euglenoid cells are covered by a pellicle composed of ribbonlike,
woven strips of proteinaceous material that cover the cell in a
helical arrangement from apex to posterior. Some examples are
Euglena, Phocus, etc.
Euglenoids
Euglena
10. Slime moulds
• have cellulose in the cell walls of their spores.
• Slime molds are heterotrophs.
• slime molds do not have chitin in their cell walls and have
a diplontic life cycle.
• These organisms move about as amoebae engulfing bacteria
(unlike fungi, who digest food externally).
• When conditions become unfavorable, whether due to lack of
food or lack of moisture, they form spores.
• They can be found in damp substrates with ample bacteria and are
most frequently found on decaying logs and forest duff.
• They resemble fungal organisms and come in dazzling colours of
multiple variants.
• Moreover, they are likely to inhabit places that are murky and
damp. Derive their nutrients from decaying and decomposing
organic material.
• Some examples of slime moulds are Fuligo, Dictydium, etc.
Dazzling slime mould
11. Protozoan Protists
• The origin of the word 'protozoa' lies in the Latin word for first
animals.
• Protozoans range in diameter from a few thousandths of a
millimetre to several millimetres.
• Protozoan usually single-celled and heterotrophic.
• They are also strictly non-multicellular and exist as either
solitary cells or cell colonies.
• Protozoa come under the group of parasitic protists that feed on
other organisms that are mostly dead, for nutrients.
• They are eukaryotes and therefore possess a “true,” or
membrane-bound, nucleus. Protozoan Protists
12. • They are also non-filamentous.
• Many protozoans either perform photosynthesis themselves or benefit from the photosynthetic
capabilities of other organisms.
• They are motile; nearly all possess flagella, cilia or pseudopodia that allow them to navigate their
aqueous habitats
• Protozoa can be further classified on the basis of their motility. The classification of protozoan
protists is given below:
• Flagellated protozoans
• Ciliated protozoans
• Amoeboid protozoans
• Sporozoans
13. Flagellated protozoans
The flagellated protozoans range from a simple oval cell with one or
more flagella to the structural sophistication of the collared flagellates.
Many other flagellated protozoans can develop stalks that connect
them to a substrate, either as single cells (e.g., the
genus Paraphysomonas) or as colonies (e.g., the genus Codosiga).
•They are free living, aquatics, parasites, commensals.
•Reproduction is by binary fission.
•For example: Trypanosoma, Giardia, Leishmania, Trichomonas
Giardia genus
14. Ciliated protozoans
• Cilia are used for locomotion and driving food.
• Body is covered by pellicle.
• Nutrition is holozoic except in the parasitic form.
• They are homogeneous group, although even they have
evolved considerable variation on the cilia-covered cell.
• In hypotrich Euplotes, cilia are combined to form thick
conical structures, called cirri, which the ciliate uses to
crawl along surfaces.
• For example: Paramecium, Vorticella, Opalina,
Balantidium
Paramecium
15. Amoeboid protozoans
•Pseudopodia used for engulfing food particles and
locomotion.
•The body may be covered with plasmalemma or a shell.
•Asexual reproduction takes place by binary fission, multiple
fission, budding and spores.
•Sexual reproduction occurs through syngamy.
•The naked amoebae are the simplest of the amoebae.
•They have no defined shape and extend one or many
pseudopodia.
•For example: Amoeba, Pelomyxa, Entamoeba.
Amoeba
16. Sporozoans
•All sporozoans are endoparasites.
•Locomotory organs are absent.
•Nutrition is parasitic.
•Life cycle has two distinct sexual and asexual phases.
•For example: Plasmodium, Monocystis, Eimeria
Plasmodium