1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tensa zangetsu [6.8K]
3 years ago
15

A medicine to remove the redness in eyes was tested in a group of 100 students. Each student took either the medicine or a place

bo in both eyes. The participants were given some free time after receiving their drops. The researcher did not keep track of what they did in that free time. It turns out that many of the people receiving the medicine spent their time outside and many of the people receiving the placebo spent their time inside. The results may now be biased because the variable location (inside vs. outside) is now a/an ____ variable.
Biology
1 answer:
Viktor [21]3 years ago
5 0

Answer:

Independent variable

Explanation:

In a scientific experiment, an independent variable is that variable which the experimenter changes or manipulates in order to effect an outcome. Only one independent variable should be tested at a time in a good experiment, all other variables should be kept constant. The initial independent variable in this experiment is TYPE OF SUBSTANCE put in the students' eyes.

However, according to the question, the researcher did not keep track of what they did in that free time. Hence, many of the people receiving the medicine spent their time outside and many of the people receiving the placebo spent their time inside. The location of every student should be a CONSTANT VARIABLE i.e. same for all students but now it has become an INDEPENDENT VARIABLE because it has been changed.

You might be interested in
The palatine tonsils are located between which two structures
vova2212 [387]

At the back of the throat is where the palatine tonsils are located. One of the tonsils is on the right side of the throat while the other tonsil is on the left side of the throat. The major roles of the these tonsils is to protect the body against gastrointestinal and respiratory infections.

6 0
3 years ago
Which statement best describes a human influence on the biogechemical cycles
Temka [501]

Answer:

Increased eutrophication caused by high levels of nitrogen and phosphorous

Explanation:

5 0
3 years ago
What is the spreading of tumor cells to distant parts of the body via blood and lymph referred to as?
Veseljchak [2.6K]
The correct answer is (c) metastasis.Metastasis is the spreading of tumor cells to distant parts of the body (from one organ to another, that is not even directly connected with it) via blood and lymph. When the doctor says that the cancer is metastatic, it means the cancer cells are spreading and can be dangerous. 
4 0
3 years ago
Read 2 more answers
Sister chromatids are attached to each other at an area called the
sp2606 [1]
They are joined together by a common centromere.
5 0
3 years ago
Which Type ir organism converts wastes and dead materials into nutrients that can be used by plants
poizon [28]

The answer is Decomposers.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Why dont electrons just fly off into space? what holds them in orbit around the nucleus
    13·1 answer
  • What do zebra mussels eat?
    11·2 answers
  • Giving brainiest! Please help ASAP!!!
    9·1 answer
  • Which characteristics must an object possess in order to be considered alive?
    9·1 answer
  • How long can you leave uncooked potatoes in water?
    6·1 answer
  • _____inherited traits that increase an organisms chance of survival, also determine an organism’s niche.
    9·1 answer
  • NAD is a(n):___________
    10·2 answers
  • Planting selectmaterial in low quality? please answer my question​
    10·1 answer
  • Another source for sulfur is from pollution cases by man-made activities. These are mixed with water in the air falling in
    14·1 answer
  • The Arctic Desert partially occupies the territory of which country? ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!