Read the scenarios below. for each of the scenarios, identify the following:
(you should identify the 3 for each of the scenarios):
control group, independent variable, dependent variable
3. john thinks that a special juice will increase the productivity of workers. he creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). group a is given the special juice to drink while they work. group b is not given the special juice. after an hour, john counts how many stacks of papers each group has made. group a made 1,587 stacks, group b made 2,113 stacks.
2. candy notices that her shower is covered in a strange green slime. her friend belinda tells her that coconut juice will get rid of the green slime. candy decides to check this out by spraying half of the shower with coconut juice. she sprays the other half of the shower with water. after 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.
1. elisa is working on a science project. her task is to answer the question: "does grow long (which is a commercial hair product) affect the speed of hair growth? " her family is willing to volunteer for the experiment.

the eggs of the insects should be the first thing collected at the scene.

false

yes? sounds right, but you didn’t ask a question.

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.