Which of the following best describes what happens to a cell's genetic material during the process of meiosis ii a) sister chromatids are separated from each other to form diploid daughter cells. b) homologous chromosomes are separated from each other to form diploid daughter cells. c) sister chromatids are separated from each other to form gametes. d) homologous chromosomes are separated from each other to form gametes.

C) Sister chromatids are separated from each other to form gametes.

Explanation:

The difference between mitosis and meiosis is that mitosis is completed in a single cycle and produces only two identical cells while meiosis has two stages meiosis I and meiosis II which produce 4 haploid cells which are not identical.

In mitosis, 23 pairs of chromosomes i.e. a total of 46 chromosomes arrange themselves in the center of the cell near equatorial plate and sister chromatids of these 46 chromosomes get separated so that each daughter cell could receive 46 chromosomes or 23 pairs. It means only two daughter cells are produced and each daughter cell gets diploid chromosomes.

But, meiosis is a bit different from mitosis. It is divided in two stages : meiosis I & meiosis II.

1) meiosis I : In meiosis I unlike mitosis, all the chromosomes do not line up in the equatorial plate, they line up in pairs instead i.e. homologous pairs get arranged so there will be 23 pairs of chromosomes arranged in the equatorial plate during meiosis I. At the end of meiosis I, 2 daughter cells will be produced each having one of the chromosomes of each pair and a total of 23 chromosomes each. So, we can say that during meiosis I, homologous pairs of 23 chromosomes will separate not sister chromatids.

2) meiosis II: In meiosis II, the sister chromatids of the 23 chromosomes which each daughter cell had received during meiosis I will get separated. Each daughter cell will give rise to 2 cells. So at the end of meiosis, 4 haploid cells are produced which are known as gametes.

answer; /// i believe that the correct answer is (50%);

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.