100 POINTS! CORRECT ANSWER GETS BRAINLIEST! How this somatic cell obtain twice as much chromosomes? Body Cells and Germ Cells Your body cells(somatic) are called diploid cells because they contain two copies of every chromosome. However, the two copies are not exact copies because one is from your mother and one is from your father. Diploid cells can be represented as 2n. In humans, the diploid chromosome number is 46. In addition to body cells, you also have germ cells located in your reproductive organs. Germ cells form gametes, or sex cells. The male sex cells are sperm and the female sex cells are eggs. Unlike body cells, gametes have only one copy of each chromosome. These cells are called haploid and can be represented as n. Human gametes thus contain 23 chromosomes. Only DNA in gametes is passed down to the organism's offspring. The DNA in body cells is not. Sexual reproduction involves the fusion of two gametes of different types, resulting in offspring that are a genetic mixture of both parents. The joining of these two gametes is called fertilization. When fertilization occurs, the nuclei of the egg and sperm fuse to form a single nucleus.

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.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

c is the correct answer!