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Volvox is a genus of multicellular green algae that forms spherical colonies called coenobia. The coenobia contain many individual cells connected by cytoplasmic strands. Volvox is found in freshwater throughout the world. It reproduces both sexually and asexually. Asexual reproduction occurs through the formation of daughter coenobia inside the parent coenobium. Sexual reproduction involves the formation of male antheridia and female oogonia, with fertilization occurring when the sperm from the antheridia fuse with the eggs in the oogonia to form zygotes. The zygotes develop into new coenobia, completing the life cycle.
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Volvox ppt
Volvox is a genus of green algae that forms spherical colonies called coenobia. Each coenobium contains many cells embedded in a gelatinous sheath. The cells are biflagellate and work together to propel the coenobium through water. Volvox reproduces both asexually through the formation of daughter coenobia inside parent coenobia, and sexually through the development of male antheridia and female oogonia. During sexual reproduction, antherozoids fertilize eggs within oogonia to form zygotes, which overwinter on the bottom of water bodies before germinating into new coenobia.
Life cycle of volvox and...
Volvox and Anabaena have similar life cycles involving both sexual and asexual reproduction.
Volvox is a spherical colony of green algae cells that reproduces asexually through the formation of daughter colonies within the parent colony. Sexually, it produces gametes that fuse to form a zygote which overwinters before germinating into a new haploid colony.
Anabaena is a genus of filamentous cyanobacteria that can reproduce asexually through fragmentation or hormogone formation. It also produces heterocysts, endospores, or akinetes for reproduction and survival in unfavorable conditions. Both organisms have life cycles that alternate between haploid and diploid stages
Chlorophyta: (Green Algae) The Phylum of Kingdom Protista.
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BOTANY .docx
1. Vaucheria is a freshwater or marine alga that grows as branched filaments attached to substrates by rhizoids. It reproduces vegetatively by fragmentation and asexually via multiflagellated zoospores or non-motile aplanospores.
2. Sexual reproduction involves the production of male antherozoids in antheridia and female eggs in oogonia, which fuse during fertilization to form zygotes that develop into oospores.
3. Pinnularia is a freshwater diatom found in ponds and moist soil. It has a cell wall composed of two overlapping silica valves. It reproduces vegetatively by cell division
Volvox.pptx
Volvox is a spherical multicellular green alga, which contains many small biflagellate somatic cells and a few large, non-motile reproductive cells called gonidia, and swims with a characteristic rolling motion.
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Introduction, Features, Unique Characters and Life Cycle of Oedogonium. This File Is best For Your Presentation.Vaucheria ppt.pptx
1. The document describes the algal genus Vaucheria, which has coenocytic, filamentous thalli.
2. Vaucheria reproduces through both asexual and sexual means. Asexually, it produces zoospores, aplanospores, and akinetes. Sexually, it produces antheridia and oogonia that undergo fertilization to form zygotes.
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Volvox ppt
Volvox is a genus of green algae that forms spherical colonies called coenobia. Each coenobium contains many cells embedded in a gelatinous sheath. The cells are biflagellate and work together to propel the coenobium through water. Volvox reproduces both asexually through the formation of daughter coenobia inside parent coenobia, and sexually through the development of male antheridia and female oogonia. During sexual reproduction, antherozoids fertilize eggs within oogonia to form zygotes, which overwinter on the bottom of water bodies before germinating into new coenobia.
Life cycle of volvox and...
Volvox and Anabaena have similar life cycles involving both sexual and asexual reproduction.
Volvox is a spherical colony of green algae cells that reproduces asexually through the formation of daughter colonies within the parent colony. Sexually, it produces gametes that fuse to form a zygote which overwinters before germinating into a new haploid colony.
Anabaena is a genus of filamentous cyanobacteria that can reproduce asexually through fragmentation or hormogone formation. It also produces heterocysts, endospores, or akinetes for reproduction and survival in unfavorable conditions. Both organisms have life cycles that alternate between haploid and diploid stages
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1. Vaucheria is a freshwater or marine alga that grows as branched filaments attached to substrates by rhizoids. It reproduces vegetatively by fragmentation and asexually via multiflagellated zoospores or non-motile aplanospores.
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3. Pinnularia is a freshwater diatom found in ponds and moist soil. It has a cell wall composed of two overlapping silica valves. It reproduces vegetatively by cell division
Volvox.pptx
Volvox is a spherical multicellular green alga, which contains many small biflagellate somatic cells and a few large, non-motile reproductive cells called gonidia, and swims with a characteristic rolling motion.
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The document summarizes the general characteristics, classification, and key features of protozoa. Protozoa are microscopic, eukaryotic, unicellular organisms. They are classified based on their locomotory organelles into four main classes: Flagellata which use flagella for movement; Rhizopoda which use pseudopods; Sporozoa which are exclusively parasitic; and Ciliata which use cilia. Each class has distinguishing characteristics including their locomotion structures, nutrition, reproduction processes, and example genera.
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1. The document describes the algal genus Vaucheria, which has coenocytic, filamentous thalli.
2. Vaucheria reproduces through both asexual and sexual means. Asexually, it produces zoospores, aplanospores, and akinetes. Sexually, it produces antheridia and oogonia that undergo fertilization to form zygotes.
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Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
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Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
ESR spectroscopy in liquid food and beverages.pptx
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
Thornton ESPP slides UK WW Network 4_6_24.pdf
ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
and the revised UWWTD (Urban Waste Water Treatment Directive)”
Applied Science: Thermodynamics, Laws & Methodology.pdf
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
20240520 Planning a Circuit Simulator in JavaScript.pptx
Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
What is greenhouse gasses and how many gasses are there to affect the Earth.
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Randomised Optimisation Algorithms in DAPHNE
Slides from talk:
Aleš Zamuda: Randomised Optimisation Algorithms in DAPHNE .
Austrian-Slovenian HPC Meeting 2024 – ASHPC24, Seeblickhotel Grundlsee in Austria, 10–13 June 2024
https://ashpc.eu/
Phenomics assisted breeding in crop improvement
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
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Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
mô tả các thí nghiệm về đánh giá tác động dòng khí hóa sau đốt
mô tả các thí nghiệm về đánh giá tác động dòng khí hóa sau đốt
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Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
20240520 Planning a Circuit Simulator in JavaScript.pptx
20240520 Planning a Circuit Simulator in JavaScript.pptx
What is greenhouse gasses and how many gasses are there to affect the Earth.
What is greenhouse gasses and how many gasses are there to affect the Earth.
Volvox.pptx
- 1. CHLOROPHYCEAE Volvox Presented by : Ratul nath Assistant professor, Department of Botany,
- 2. Systematic position Kingdom - Plantae Division - Chlorophyta Class - Chlorophyceae Order - Volvocales Family -Volvocaceae Genus- Volvox
- 3. OCCURENCE Includes about 20 species All are aquatic and free floating They mostly occur in fresh water bodies It forms a beautiful green coloured phytoplankton on the surface of water body It occurs as green rolling balls of pin head sized coenobia
- 4. VEGETATIVE STRUCTURE Plant body is multicellular motile coenobium The coenobia of Volvox are spherical, oval are ellipsoidal in shape Each cell is biflagellate and the alga rolls over the surface of water by the joint action of flagella of other cells by a series of cytoplasmic strands, called plasmodesmata. • The coenobium of Volvox is an assemblage of similar and independent cells. Each cell performs its own function of nutrition, respiration and excretion. • Each cell has its own gelatinous sheath. It is connected with the sheath of other cells by a series of cytoplasmic strands, called plasmodesmata.
- 6. REPRODUCTION ASEXUAL REPRODUCTION 1. Occurs during growing season at maturity, few cells in posterior half are pushed back into hollow cavity. 2. Cells withdraw their flagella, increase in size, become round shaped. 3. These reproductive cells are called gonidia. 4. The protoplasm of each gonidium divides by successive longitudinal divisions & forms daughter coenobium. 5. Sometimes, young coenobia are formed inside the young daughter coenobia, called grand daughter colonies.
- 9. ANTHERIDIA (ANDROGONIDIA) and OOGONIA (GYNOGONIDIA Each antherozoid is uninucleate, biflagellate and possesses a small chloroplast. • The mass of antherozoids (spermatozoids) is released at maturity. • The protoplasm of female gametangium does not divide, but metamorphosed into single, non flagellated green spherical egg or oosphere. • The female gametangium is now called oogonium.
- 10. FERTILIZATION •The antherozoids are attracted chemotactically towards oogonium • Only one antherozoid fuses with the egg from the side and the egg now become zygote
- 11. SEXUAL REPRODUCTION OOGAMOUS TYPE • Male sex organs: Antheridia (androgonia) • Female sex organs: oogonia (Gynogonidia) • Some species are monoecious and some are dioecious • Some cells at posterior half of coenobium retract flagella, enlarge, & become gametangia • Male gametangium give rise to antheridium and female gametangium to oogonium
- 12. ZYGOTE • Zygote secretes its own cell wall. It is three layered – exospore, mesospore and endospore • The zygote remains embedded inside the oogonium and tides over the unfavourable conditions • Finally the parent colony decays and the zygote fall to the bottom of water body • Prior to germination, the diploid nucleus of zygote divides by meiosis • Zygote protoplasm metamorphoses into a zoospore • Zygote divides to form a hollow sphere of cells and produces a young coenobium
- 13. LIFE CYCLE
- 14. THANKS