Answer:
E. All of the above
Explanation:
The cell cycle refers to the orderly series of events that make new daughter cells by dividing the existing cells. The cell cycle is required to produce new cells during growth and development, to replace the old and damaged cells, and to repair the tissue by adding the new cells. If the existing cells do not enter the cell cycle, new cells would not be formed to be added to the tissues of the organisms.
However, the cell cycle is regulated at several checkpoints to ensure that a cell enters the process only when the new cells are required by the body and the process is stopped once the required number of new cells are formed. Any deviation from the regulation of the cell cycle may make the cells to enter the uncontrolled cell division. It may even lead to cancer where the cells divide without any control and produce malignant tumors.
Answer:
The cloned sheep is the result of nuclear fusion from two different sheeps. In one sheep the enucleated egg is fused with DNA of another sheep.
Explanation:
The cloned sheep is the result of nuclear fusion of 2 different sheep. In the cloning process, the egg cell of one sheep was enucleated. Then a DNA from another sheep had taken and put into the enucleated egg cell to fuse. Then the egg allowed to divide in the laboratory to the blastocyst stage. The blastocyst incorporated into a surrogate mother or a third sheep. The surrogate mother after some months gives birth to the cloned sheep.
The sheep produced by normal reproduction has the DNA of two parents. The sheep have two parents and resemble their parents.
In cloned sheep, there is no biological parent and have DNA of the donor sheep. That means the cloned sheep has a gene of a single sheep not the DNA of others. Because the egg cell was enucleated before the cloning process. The sheep are more like the donor DNA sheep not like the surrogate mother.
Astronomers use an effect called parallax.
Atom in Latin is atomus which means the smallest particles
Answer:
C. Muridae
Explanation:
The family Muridae includes mammals such as rats and mice. Some of the specific features of the members of family Muridae are the absence of premolars. Most of these mammals have three ever-growing molars. According to the species, these mammals may be herbivorous carnivorous or omnivorous. They have four claws on each front foot and five claws on the hind feet. The rodent mammals are classified under the order Rodentia. The house mouse species belong to the genus Mus.
