ove doesn’t equal sex.
It’s important to remember that asexuality is an umbrella term, and exists on a spectrum. Asexual people – also known as “Ace” or “Aces” – may have little interest in having sex, even though they desire emotionally intimate relationships. Within the ace community there are many ways for people to identify.
Asexuality Chart
Here are just a few common terms to explore:
Demisexual: People who only experience sexual attraction once they form a strong emotional connection with another person.
Grey-A: People who identify somewhere between sexual and asexual.
Queerplatonic: People who experience a type of non-romantic relationship where there is an intense emotional connection that goes beyond a traditional friendship.
Aces commonly use hetero-, homo-, bi-, and pan- in front of the word romantic to describe who they experience romantic attraction to. For example, a person who is hetero-romantic might be attracted to people of a different sex or gender, but not in a sexual way.
Asexuality Blurry Do and Don't Say
FAQ
My friends talk about sex all the time, but I don’t feel any desire to be with someone in that way. Is it normal to not feel any sexual attraction towards other people?
I am romantically attracted to boys and girls, but I don’t want to be with them physically. Can I be bisexual and asexual?
I kissed my boyfriend for the first time and it was gross! Does this mean I am asexual?
How do I tell my partner/the person I like that I am asexual?
People are telling me that something is wrong with me now that I’ve come out as asexual. Even worse, some are saying that asexuality doesn’t exist. How can I help them understand me?
Question 1: My friends talk about sex all the time, but I d
This slideshow was created as a seventh-grade example of what a student might accomplish to give a presentation to the class or group of kids about sexual and asexual reproduction.
This slideshow was created as a seventh-grade example of what a student might accomplish to give a presentation to the class or group of kids about sexual and asexual reproduction.
Learn why reproduction is important for life on earth. Also recognize that animals viz., mammals, birds, reptiles, insects, frogs, fish, etc., reproduce in different ways.
Learn why reproduction is important for life on earth. Also recognize that animals viz., mammals, birds, reptiles, insects, frogs, fish, etc., reproduce in different ways.
cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature. These cells cooperate with other specialized cells and become the building blocks of large multicellular organisms, such as humans and other animals. Although cells are much larger than atoms, they are still very small. The smallest known cells are a group of tiny bacteria called mycoplasmas; some of these single-celled organisms are spheres as small as 0.2 μm in diameter (1μm = about 0.000039 inch), with a total mass of 10−14 gram—equal to that of 8,000,000,000 hydrogen atoms. Cells of humans typically have a mass 400,000 times larger than the mass of a single mycoplasma bacterium, but even human cells are only about 20 μm across. It would require a sheet of about 10,000 human cells to cover the head of a pin, and each human organism is composed of more than 30,000,000,000,000 cells.
similarities and differences between cells
similarities and differences between cells
Basic similarities between cells and ways cells may vary depending on their function.
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This article discusses the cell both as an individual unit and as a contributing part of a larger organism. As an individual unit, the cell is capable of metabolizing its own nutrients, synthesizing many types of molecules, providing its own energy, and replicating itself in order to produce succeeding generations. It can be viewed as an enclosed vessel, within which innumerable chemical reactions take place simultaneously. These reactions are under very precise control so that they contribute to the life and procreation of the cell. In a multicellular organism, cells become specialized to perform different functions through the process of differentiation. In order to do this, each cell keeps in constant communication with its neighbours. As it receives nutrients from and expels wastes into its surroundings, it adheres to and cooperates with other cells. Cooperative assemblies of similar cells form tissues, and a cooperation between tissues in turn forms organs, which carry out the functions necessary to sustain the life of an organism.
Consider how a single-celled organism contains the necessary structures to eat, grow, and reproduce
Consider how a single-celled organism contains the necessary structures to eat, grow, and reproduce
Cells are the basic units of life.
See all videos for this article
Special emphasis is given in this article to animal cells, with some discussion of the energy-synthesizing processes and extracellular components peculiar to plants. (For detailed discussion of the biochemistry of plant cells, see photosynthesis. For a full treatment of the genetic events in the cell nucleus, see heredity.)
Bruce M. Alberts
It is essential for teenagers to understand the hierarchy of values. Even at an early stage of their lives, they should already learn what things should be given priority over others. Should they give more value to material things or should they prioritize more the relationship they have with the people around them? The decisions should be based on what is more important. It should be kept in mind that the realization of proper order of values would lead to the fulfillment or totality as an individual-responsible, truthful, peace-loving, and God-fearing
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solution, in chemistry, a homogenous mixture of two or more substances in relative amounts that can be varied continuously up to what is called the limit of solubility. The term solution is commonly applied to the liquid state of matter, but solutions of gases and solids are possible. Air, for example, is a solution consisting chiefly of oxygen and nitrogen with trace amounts of several other gases, and brass is a solution composed of copper and zinc.
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You Are Here:Home → Genetics → Help Me Understand Genetics → Cells and DNA → What is DNA?
What is DNA?
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DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.
The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.
DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.
An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.
DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone.
DNA is made up of base pairs and a sugar phosphate backbone.
Credit: U.S. National Library of Medicine
For more information about DNA:
The National Human Genome Research Institute (NHGRI), a part of the National Institutes of Health (NIH), provides a fact sheet Deoxyribonucleic Acid (DNA) that gives an introduction to this molecule.From the National Institutes of Health
StatedClearly offers a video introduction to DNA and how it works.
The New Genetics, a publication of the National Institute of General Medical Sciences, part of the NIH, discusses the structure of DNA and how it was discovered.From the National Institutes of Health
the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Make a Field invisible in Odoo 17Celine George
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This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
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!
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
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The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
5. ASEXUAL REPRODUCTION
It is the reproduction mode where a single
organism (parent) gives rise to its offspring.
6. it is the relatively faster reproduction mode because less time and
energy is required in the process.
The offspring is essentially the clone of the parent as their genetical
makeup is 100% identical.
Lack of genetic variability in clones makes the species more
vulnerable in extinction when drastic change in environment occur.
It is a typical in prokaryotic organisms like fungi, protozoa, and
certain plants and animals can also reproduce asexually.
ASEXUAL REPRODUCTION
7. SEXUAL REPRODUCTION
It is the reproduction mode that involves two
sexually opposite parents – a female and a
male one.
8. It involves the union of gametes or sex cells particularly
the egg cell from female and sperm cell from male in the
process called fertilization.
It is relatively slower reproduction mode because more
energy and time is required in the process.
The offspring in sexual reproduction has a genetic make
up that is 50%identical to its mother and 50% identical
to its father.
SEXUAL REPRODUCTION
9. However the expression of the genetic traits in an offspring is not
straightforward thing because of the existence of dominant and
recessive genes that determine which traits will be expressed or
suppressed.
A gene refers to the physical and functional unit of heredity which is
found in the deoxyribonucleic acid (DNA) inside the cell’s nucleus.
Genetic variability may give rise to favorable characteristics that can
make species more resistant to extinction when faced with drastic
changes in its environment.
SEXUAL REPRODUCTION
11. Match it Up- From your prior knowledge, match up the
two types of reproduction with their characteristics and
place the items a the Venn Diagram in your interactive
notebook
Reproduction Type
Sexual reproduction
Asexual reproduction
Characteristics
Two parents
Identical offspring
One parent
Not identical offspring
Passes on DNA to from parent to
offspring
Bacteria, protists, some plants, yeast
Fish, Mammals, Amphibians, Birds,
Reptiles, Insects
11
12. Make a Venn Diagram 12
Asexual Reproduction Sexual Reproduction
Both
Types of
reproduction
in living
organisms
Pass DNA
from parent
to offspring
13. Picture Play
Look at each picture and decide whether
it demonstrated asexual or sexual
reproduction and describe why you think
so.
13
17. She can reproduce the old-fashioned way, by
mating with a male and laying eggs. Or she can
lay eggs without having mated, through a sort of
virgin birth process called parthenogenesis.
17
18. Asexual Reproduction
Requires only one parent
Offspring have 100% the same chromosomes as the parent.
In other words, the offspring are exact “clones” of the parent.
Most unicellular organisms
reproduce this way.
Mitosis
18
19. Asexual Reproduction
Binary Fission
Bacteria
Protists
19
Binary fission is a form
of asexual reproduction
where every organelle
is copied and the
organism divides in
two.
20. Asexual Reproduction
Budding
Hydra (usually asexual)
20
Budding is a means of
asexual reproduction
whereby a new individual
develops from an
outgrowth of a parent,
splits off, and lives
independently.
21. Asexual Reproduction- Spore
Found in fungi, algae, protozoa
Airborne cells that are released from the parent. They are
enclosed and developed when the environment is
appropriate
21
24. Asexual Reproduction
Plant cuttings/ vegetative
propagation
24
Vegetative reproduction is a type of asexual
reproduction in plants that relies on multi-
cellular structures formed by the parent
plant. It has long been exploited in
horticulture and agriculture, with various
methods employed to multiply stocks of
plants.
25. Asexual reproduction- Mitosis
The process where animal cells divide
This is a type of asexual reproduction
Body cells (somatic cells) go through
the process of mitosis
Results in an exact copy of the parent
cell
25
26. Asexual Reproduction
Examples of organisms that reproduce asexually
Hydra
Sea Star
Strawberry
Archaebacteria
Eubacteria
Euglena
Paramecium
Yeast
26
27. Sexual Reproduction
All the members of the Animal Kingdom
Fish
Mammals
Amphibians
Birds
Reptiles
Insects
Crustaceans
27
28. Sexual Reproduction
Requires two parents that each share ½ of the genetic information.
Offspring share the characteristics of each parent.
Meiosis
28
29. Advantages vs Disadvantages of
Asexual Reproduction
Advantages
Asexual reproduction produces more
offspring
Asexual reproduction takes less time
Only one parent involved. No
searching for mates
Requires less energy
Disadvantages
Same DNA being passed down NO
GENETIC VARIATION IN THE
OFFSPRING
If parent has genetic disease offspring
will have it too
29
30. Advantages vs Disadvantages of
Sexual Reproduction
Advantages
Variation in offspring
Organism is more protected because
of genetic variation
Disadvantages
Requires two organisms. Must find a
mate
requires more cellular energy
More time required for offspring
development
30
31. Sexual Reproduction
Plant Kingdom
Flowers are the reproductive organs of plants.
Some flowers have both male and female reproductive organs on the same
flower.
31
Male flower Female flower
32. Sexual Reproduction
Examples of organisms that reproduce sexually
Chickens
Iguanas
Lobsters
Sharks
Humans
Butterflies
Sunflowers
Roses
32
33. Sexual Reproduction
Happens 2 ways
Internally (inside)
The egg is fertilized by sperm inside the female
Mammals, birds, reptiles, insects, spiders
Externally (outside)
The egg is fertilized by sperm outside the female
The female lays the eggs and then the male fertilizes them.
Fish and some amphibians
Plants and fungi (pollen and spores)
33
34. Summarize
Write two paragraphs with 6 sentences each describing asexual and sexual
reproduction.
Paragraph 1: Asexual reproduction is…..
Paragraph 2: Sexual reproduction is…
34