The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...
Biology - How Organisms Reproduce
Introduction
A basic occurrence in reproduction is the creation of a DNA copy; to produce copies of the DNA, cells use chemical reactions.
The DNA in the cell nucleus is actually the information source for creating proteins. Likewise, if the information is changed here, then different proteins will be created. And, these different proteins will eventually lead to altered the body designs.
DNA copies that generated would be similar, but may not be identical to the original. And, because of these variations, the new born cells are slightly different.
Further, the consistency of DNA copying during reproduction process is significant for the maintenance of body design and features.
Modes of Reproduction Used by Cell Organisms
The modes by which various Cell Organisms reproduce depend on their body designs. However, it is broadly categorized as −
Asexual Reproduction &
Sexual Reproduction
Let’s discuss each of them in Brief −
Asexual Reproduction
Asexual Reproduction can be studied through the following different sub-categories −
Fission
Fragmentation
Regeneration
Budding
Vegetative Propagation
Spore Formation
Let’s discuss each of them in brief −
Fission
In some unicellular organisms such as Amoeba, the cell split into two cells during the cell division and produce two new organisms (see the image given below).
It is also known as binary fission.
Many bacteria and protozoa simply split into two equal halves during their cell division and produce two identical organisms.
Remember, some other single-celled organisms, such as Plasmodium (the malarial parasite), divide into many daughter cells simultaneously, known as multiple fission (see the image given below).
Fragmentation
After the maturity, some multicellular organisms, such as Spirogyra, simply breaks up into smaller pieces and these pieces or fragments grow into new individuals.
Regeneration
Some of the organisms, such as Planaria, if its body cut or broken up into many pieces, then many of these pieces grow into complete separate individuals; the whole process is known as regeneration.
Budding
In some organisms, such as Hydra, because of the repeated cell division at one specific place, a bud develops, which later (once fully grown) gets detached from the parent body and becomes a new independent individual (see the image given below).
Vegetative Propagation
Under a favorable condition, there are many plants, which parts like the root, stem, and leaves develop into new plants; such process is known as vegetative propagation (see the image given below).
Spore Formation
Some plants and many algae undergo sporic formation (through meiosis cell division) that leads to the formation of spores. Further, these spores grow into multicellular individuals.
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