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Who was the first person to sucessfully clone something?
The first successful cloning of an organism was achieved by biologist Sir John Gurdon in 1952. He cloned a tadpole by replacing the nucleus of an egg cell with the nucleus from a tadpole's intestinal cell.
Where does the tadpole's tail go?
During metamorphosis, a tadpole's tail is gradually reabsorbed into its body. This process allows the tadpole to transition into a frog with legs and lungs for its terrestrial adult life. The tail provides nutrients for the tadpole as it changes and is no longer needed once the frog is fully developed.
Difference between frog and tadpole?
Frogs start out their life as eggs. A female frog lays the eggs, and a male frog then fertilizes the eggs. The fertilized eggs will generally take one to three weeks to hatch. What hatches from the eggs is called a tadpole. As the tadpole ages and matures, it goes through a process called metamorphosis. Throughout this phase, the body of the tadpole gradually transforms into a frog.DietWhen the tadpole first hatches, it is too frail to find food on its own. Luckily, the remainder of the yolk from its egg is in its stomach when it hatches; this sustains the tadpole for its first week of life. Once it develops strength and coordination, the tadpole will begin to feed on algae and other underwater foliage. At around two months into its life, its diet of plants is supplemented by bugs and small organisms.Soon after, the tadpole becomes a frog. Young frogs will still eat a diet that includes algae and foliage. As they mature, they become better at hunting live prey. Eventually, the staple of the diet of a frog is bugs and worms. A frog's sticky tongue traps insects. Though their diet consists mainly of bugs, some frogs have been known to eat small fish.Body StructureA tadpole starts out as a body mass with an elongated tail. As metamorphosis takes effect, it begins sprouting legs and arms and grows small teeth that allow it to eat algae and small bugs. The body elongates, and the tail shrinks. The main difference, however, in the body structure of a tadpole is that it has gills. Gills allow the tadpole to breathe underwater. This is important because it does not have legs and arms yet, or the muscular structure to support itself on land.Frogs have a strong muscular structure that allows them to be mobile both on land and in the water. Their hind legs are long and powerful, and their feet are webbed for greater swimming efficiency. Most importantly, mature frogs breathe through lungs instead of gills. Mature frogs can no longer breathe under water.MovementTadpoles have one way of moving: swimming. Tadpoles will stay in the water until they evolve into frogs. Young tadpoles are not very proficient swimmers and attach themselves to foliage until they are more developed. As they mature, the tadpoles begin to learn to swim by moving their tails back and forth.Frogs, on the other hand, can both swim and hop. The difference between a frog swimming and a tadpole swimming is the means of propulsion. Tadpoles use their tails, but frogs have no tails. Frogs use their hind legs and propel themselves forward in a kicking motion. On land, frogs can move by hopping around, something that tadpoles are not capable of.
Why are worms able to regrow their tails?
Worms are able to regrow their tails because they possess a high regenerative capacity, meaning they have the ability to regenerate lost body parts. This regenerative ability is due to the presence of specialized cells, called neoblasts, which are capable of dividing and differentiating into various cell types to rebuild the tail.
What did Gurdon's frog experiment prove?
Gurdon's experiment proved that a cell's genetic potential do not diminish as the cell became specialized, disproving the conclusion of Robert Briggs and Thomas King following their failures to clone from differentiated cells in their 1952 landmark tadpole experiment. Gurdon's results electrified the scientific community, but some scientists remained skeptical and began to find flaws in his work.
How does the size of a tadpole cell compare to the size of a blue whale cell?
They are the same size the tadpole just has less
What type of cell is a tadpole?
It is not a cell. It is a multicelluar organism.
What makes up two layer of the cell membrane?
Both layers are composed of phospholipids (with the tails facing in towards each other, and the polar heads facing out).
Why mitochondria disappear in cell division?
out of water or food
IN the first stage of cell reproduction the disappear?
the sperm
What was the first experiment conducted in cloning?
The first successful cloning experiment was conducted by biologist John Gurdon in 1958 with frogs. He transferred the nucleus of a fully differentiated cell from a tadpole into an egg cell that had its nucleus removed. This led to the development of a clone of the original tadpole.
What has heads and tails and are found in a cell membrane?
Phospholipids.
Where are the cell membranes located in the places where no cells are?
That makes... No sense. How can a cell membrane be there when there is no cell? Okay, well, I'll just tell you the gist of what a cell membrane consists of: It has a phospho-lipid bi-layer with hydrophilic phosphate heads and hydrophobic tails. Heads are polar, tails are nonpolar. Um... obviously, it's a membrane, meaning it's on the outside of the cell. It's semi-permeable with both active and passive transport proteins allowing passage.
What makes up the 2 lays of the cell membrane?
The cell membrane is made of a phosolipid bi-layer. The phosolipid is made up of a glycerol backbone, 2 fatty acid chains which make the non-polar (hydrophobic) tails and a phosphate group which makes the polar (hydrophilic) head.
Does mitochondria have a tails?
No, mitochondria are organelles in a cell. Tails, or specifically flagella, are used for movement, and since mitochondria do not need to move from one place to another, they do not have tails.
Which year started the cloning?
Cloning was first performed in 1970 when Dr. John B Gurdon (UK) cloned a frog by transplanting the intestinal cell of a tadpole into a frog egg cell where the nucleus was removed. This develops into the adult frog with the same genotype as the tadpole used for the experiment
Spindle fibers disappear when a cell is in this phase of mitosis.?
telophase
