Sounds like a multiple choice question, may I have the options?
The best answer is A
Saltwater fish are hypotonic to their surroundings. This means their blood has a higher water concentration than the surrounding sea water.
Due to the fact that there is more salt and less water outside their bodies, there is a tendency to take in salt and lose water.
To counter this, salt water fish drink a lot of the sea water and urinate very little. Special cells in the gills actively eliminate salt at the cost of extra energy and these fishes do not absorb any salt from the water they drink.
I would say it’s Either D or C.
Answer: The options are not given, here are the options.
A) the lack of an effective method to induce division of the product of the somatic cell fusion product
B) the difficulty in extracting nuclei from somatic cells
C) the lack of an efficient method for injecting the somatic cell nucleus into the egg cell
D) variations in the completeness of epigenetic programming of the somatic cell nucleus
The correct option is
D) variations in the completeness of epigenetic programming of the somatic cell nucleus
Explanation:
Nuclear transplantation method is the method in which the nucleus from a donor cell is removed and inserted in the target cell in which also it's nucleus has been removed or enucleated. The nuclear transplantations has slowed
embryologists to interfere the development of an organism and to study nucleus to direct development. It has been used for the cloning of several species.
Nuclear transplantation has failed in cloning because variations in the completeness of epigenetic programming of the somatic cell nucleus.
By trapping harmful substances I believe :)
