Melissa is studying a gram-stained slide of curd bacteria. she sees many rod-shaped, violet-colored bacteria.

what type of bacteria are they?

They are gram positive bacteria

Explanation:

To find out if the bacteria is gram negative or gram positive, the Gram Test is done. This test allows bacteria to be viewed under the light microscope, since without staining it is impossible to observe or identify their structure. The Gram Test involves 3 main steps:

• Crystal violet staining (a water soluble dye, purple);

• Discoloration (using ethanol / acetone);

• Counterstaining (using Safranina dye, red).

After the test, bacteria that are violet-colored in the dye (such as the bacteria Melissa is observing) are called Gram positive. Gram-positive bacteria retain the violet crystal due to the presence of a thick layer of peptidoglycan (a polymer made up of sugars and amino acids that originates from a mesh outside the cell membrane of the bacteria) in their cell walls, showing the color Violet.  Gram-negative bacteria, on the other hand, have a thinner peptidoglycan wall that does not retain the violet crystal during the discoloration process and are red in the final staining process.

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.

what in the weirdo : o