Human beings have always been perplexed about the origin and evolution of life on earth. For centuries, a number of theories and hypothesis have been suggested to explain the evolutionary process.
In the previous year, in a very short time life was created by some supernatural power. Most of the religions and civilizations still believe in it, however, they do not have a scientific explanation and more a matter of faith. There has always been an attempt by the scientists and naturalists with keen observation, to explain the evolution scientifically and to look for its evidences.
The process of evolution involves a gradual change or variation in the organisms generation after generation. It means that the organisms of present-day have arisen from ancestors that were simpler in an organisation.
Human beings have always been perplexed about the origin and evolution of life on earth. For centuries, a number of theories and hypothesis have been suggested to explain the evolutionary process.
In the previous year, in a very short time life was created by some supernatural power. Most of the religions and civilizations still believe in it, however, they do not have a scientific explanation and more a matter of faith. There has always been an attempt by the scientists and naturalists with keen observation, to explain the evolution scientifically and to look for its evidences.
The process of evolution involves a gradual change or variation in the organisms generation after generation. It means that the organisms of present-day have arisen from ancestors that were simpler in an organisation.
Human beings have always been perplexed about the origin and evolution of life on earth. For centuries, a number of theories and hypothesis have been suggested to explain the evolutionary process.
In the previous year, in a very short time life was created by some supernatural power. Most of the religions and civilizations still believe in it, however, they do not have a scientific explanation and more a matter of faith. There has always been an attempt by the scientists and naturalists with keen observation, to explain the evolution scientifically and to look for its evidences.
The process of evolution involves a gradual change or variation in the organisms generation after generation. It means that the organisms of present-day have arisen from ancestors that were simpler in an organisation.
Darwinism and natural selection 7th zol.pptximranrohi56
Darwin's three main principles of natural selection state that, in order for the process to occur, most characteristics in the population must be inherited, more offspring must be produced than can survive, and the fittest offspring must be more likely to survive and reproduce.In the mid-19th century, a man came up with a very powerful idea, the idea that species could change. Today, all the time, we hear about animals adapting, endangered species going extinct, viruses mutating. But in the 1800s, people conceptualized a much more static world. One man looked past all that. His name was Charles Darwin.
Darwin called his idea the theory of natural selection. Natural selection is defined as a natural process that results in the survival and reproduction of organisms with genetic traits best suited to their environment. A shorter (but no less accurate) definition might be "survival of the fittest." Within any population, the fittest individuals, or the ones who fit the environment best, usually survive and reproduce, passing on their genetic traits to future generations.
Human beings have always been perplexed about the origin and evolution of life on earth. For centuries, a number of theories and hypothesis have been suggested to explain the evolutionary process.
In the previous year, in a very short time life was created by some supernatural power. Most of the religions and civilizations still believe in it, however, they do not have a scientific explanation and more a matter of faith. There has always been an attempt by the scientists and naturalists with keen observation, to explain the evolution scientifically and to look for its evidences.
The process of evolution involves a gradual change or variation in the organisms generation after generation. It means that the organisms of present-day have arisen from ancestors that were simpler in an organisation.
Darwinism and natural selection 7th zol.pptximranrohi56
Darwin's three main principles of natural selection state that, in order for the process to occur, most characteristics in the population must be inherited, more offspring must be produced than can survive, and the fittest offspring must be more likely to survive and reproduce.In the mid-19th century, a man came up with a very powerful idea, the idea that species could change. Today, all the time, we hear about animals adapting, endangered species going extinct, viruses mutating. But in the 1800s, people conceptualized a much more static world. One man looked past all that. His name was Charles Darwin.
Darwin called his idea the theory of natural selection. Natural selection is defined as a natural process that results in the survival and reproduction of organisms with genetic traits best suited to their environment. A shorter (but no less accurate) definition might be "survival of the fittest." Within any population, the fittest individuals, or the ones who fit the environment best, usually survive and reproduce, passing on their genetic traits to future generations.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
2. Theory of Use and Disuse
► Jean Baptiste LAMARCK
(1744-1829)
► Theory was based on NEED
Organs needed if
environmental stresses its
function, while those organs
not needed gradually
disappeared because of
disuse.
IF YOU DON’T USE IT, YOU
LOSE IT!
3. Theory of Use and Disuse
►Lamarck believed in the inheritance of
ACQUIRED CHARACTERISTICS
Body changes due to an organism’s behavior or
experience that occur within an organism’s life
could then be passed on to offspring
EXAMPLES:
►Webbed foot of water birds – the repeated stretching
of membrane between the toes was passed on to
offspring
►Organisms not using tail would produce offspring
with smaller tails
4. Acquired Characteristics
► Giraffe Example:
Giraffes must stretch their
necks to reach leaves on the
tops of trees
This longer neck then got
passed to offspring
5. Disproving Lamarck
►Experiments were conducted to try to prove
Lamarck’s ideas, but none of them were
successful
Petals on flowers
Female waist (corsets)
Tails of mice
6. Darwin’s Theories
► Charles Darwin (1809-
1882)
1831 – traveled aboard
HMS Beagle as a
recorder/naturalist
Collected many
specimens and
documented many of his
observations - noted
much variety!
7. Darwin’s Theories
Spent time in the Galapagos
Islands
►Tortoises on different
islands displayed different
characteristics
Harriett was 5 when Darwin
captured her. Lived to be 176
years old (Died June 2006)
►Finch beaks (13 varieties)
varied in size & shape from
island to island
Took 20 years to organize data
and develop his theory of
evolution!
8. Darwin’s Theories
► Alfred WALLACE, independent of Darwin, also
developed ideas that were very similar to
Darwin’s – they presented their ideas jointly to
the public in 1858 (Linnaean Society in
London)
► Darwin wrote On The Origin of
Species presenting his theory
of evolution based on natural
selection.
9. What is The Theory of Natural
Selection?
►NATURAL SELECTION – individuals within a
population with the most favorable traits for
an environment survive and pass on those
traits
►Based on 4 statements
1) Organisms produce many offspring and have
potential to grow unchecked
2) Variations exist within a species (at that time
DID NOT know that it was a result of mutations
& genetic recombination)
10. What is The Theory of Natural
Selection?
3) Competition for limited resources (struggle for existence
– food, disease, predators)
4) Environment selects organisms with favorable traits
►“Survival of the fittest”
►ADAPTATION – a variation that improves an organism’s
chance of survival
►A population adapts to their environment as their
proportion of genes for a favorable trait increases
► DARWIN’S THEORY IS STILL RELIED UPON TODAY AND IS
SUPPORTED THROUGH EXPERIMENTATION.
11. Natural Selection Example
► The peppered moth
Before the industrial revolution in Britain, most peppered
moths were of the pale variety & were well camouflaged
against the pale birch trees that they like to sit on.
Moths with the mutant black coloring were easily
spotted and eaten by birds - giving the white peppered
variety an advantage
12. Natural Selection Example
► Then the industrial revolution came along
in the 19th century.
► Airborne pollution in industrial areas
mottled the birch tree bark with soot, and
now the mutant black-peppered moths
blended better against the darkened
bark, while the white variety became
much more vulnerable to predators
► Over time the mutated black peppered
moths were naturally selected to survive
and became far more numerous in urban
areas than the pale variety.
► Peppered Moth Simulation
