Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. in which stage of the cell cycle is this process reversed?

Mitosis is the process by which a single parent cell divide into two identical daughter cells. The process occurs in five stages, which are: interphase, prophase, metaphase, anaphase and telophase. The processes that occur in the early part of mitosis are usually reversed at the telophase stage, which is the last stage of the process. At the telophase stage, the nuclear membrane and the neucleoi reappear and the chromosome begins to condense.

The correct answer would be the telophase of mitosis.

Mitosis or M-phase of the cell cycle is the phase in which actual cell division takes place.

It is sub-divided into four stages:

1. Prophase:

Early prophase:

Late prophase or prometaphase:

2. Metaphase: All chromosomes are aligned at the center forming a metaphase plate. In addition, two kinetochores of each chromosomes are attached to the microtubules extending from opposite spindle fibres.

3. Anaphase: The sister chromatids of the chromosome are pulled towards opposite ends of the cell. Also, the cell elongates which help in division.

4. Telophase: It is exactly opposite to what happens in the prophase. The mitotic spindle break down, nuclear membrane and nucleus reappear, and chromosome again decondense to form chromatin fibres.

Cytokinesis results in the formation of two daughter cells.

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.

well, i believe that the answer is 2. : 3