DNA replication is called because the newly replicated DNA consist of a parental strand (from the original DNA) and a newly synthesized daughter strand.

Semi-conservative

Explanation:

The semi-conservative DNA replication model was initially hypothesized by Watson and Crick, but was later proven by the Meselson-Stahl experiment, in which DNA samples were tagged, and after replication, it was observed that the two resulting DNA both had one strand each from the parent DNA strand.

This dispelled the conservative model which proposed that the two strands of the daughter DNA are newly synthesized, while the parent DNA only served as a template.

The correct answer is semi-conservative.

SEMI-CONSERVATIVE.

DNA replication is called semi-conservative because the newly replicated DNA consist of a parental strand (from the original DNA) and a newly synthesized daughter strand.

Explanation:

The is so because during DNA replication;

There is the unzipping of the double helix structure of the DNA by an enzyme HELICASE thereby creating replication fork which is Y shaped.

The separated strands each wilk act as templates for making new strands of DNA.

One of the strand is called leading strand oriented in the 3' to 5' direction that is towards the replication fork and the other lagging strand in the 5' to 3' direction.

RNA primase acts on the leading strand acting as the starting point for the synthesis of the new DNA.

DNA polymerase binds to the leading strand and add new complementary necleotides in the 5' to 3' direction.

Okazaki fragments are added to the lagging strand in the 5' to 3' direction. Enzyme ligase seals the DNA strands after proofreading and completes the process of replication.

In conclusion, new DNA strands with half of the parent strand and a half of a newly produced DNA and it's is therefore called Semi- Conservative.

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.