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
bogdanovich [222]
3 years ago
13

Stella thinks that if people are exposed ultraviolet light then they are more likely get skin cancer. Stella designs an experime

nt wherein sample A consisted of people were exposed to ultraviolet light and sample B was not.
what is the independent variable?
Biology
2 answers:
alekssr [168]3 years ago
5 0
Independent variable: is the UV light exposure

Control group: people not exposed (sample b)

Dependent variable: skin cancer

Experimental group: (sample A)
lisabon 2012 [21]3 years ago
5 0

Answer:

The amount of UV light exposure.

Explanation:

The independent variable is the one variable that an individual must change during an experiment in order to investigate or test the dependent variable. Basically their relationship to the experiment or between themselves can be easily remembered through their names: The independent variable is the one that's controlled by the researcher and therefore does not <em>depend</em> on other variables from the experiment (amount of UV light), the dependent variable <em>depends</em> on the independent variable since its often the result from the latter's variations (cases where people developed skin cancer) and finally, the controlled variable is the one that's kept the same throughout the experiment (Time exposed to sunlight within group A or method through which patients were tested for skin cancer).

You might be interested in
While testing for biological macromolecules in an unknown, you find that it reacts strongly with iodine and the solution immedia
True [87]

The macromolecule must be starch.

Explanation:

Starch is a polymer of Glucose joined by glycosydic bond.

Starch is the main energy storage substance in green plants.

Starches react with iodine and give a bluish black or black color and thus iodine test is considered as a confirmatory test for starches.

In this experiment ,the solution turns very dark black on addition of iodine so we can be sure that the solution contained starch.

6 0
3 years ago
Hey guys. So I need your help I have this rock presentation assignment worth 90 points and I have to find a good title. It’s abo
Arturiano [62]

Answer:

stone is stone , the most beautiful stone it is right I think

6 0
3 years ago
Compare and contrast the bones of a birds wing and a seals flipper
deff fn [24]
A seals flippers has finger bones when a birds wing is just a bone connected to other joints.
5 0
3 years ago
The nurse should use which needle when administering a nonviscous solution by the intramuscular (im) route for an adult?
Greeley [361]
<span>The most appropriate choice of needle for someone of this size is a 1.5 in, 22 gauge needle. It is important for the needle to be 22 gauge so that it is an appropriate thickness to be injected into the muscle tissue.</span>
5 0
3 years ago
Read 2 more answers
Jon likes hiking. He observes that whenever he hikes up a hill he breathes heavier than when he is on flat ground. Which 2 state
Alekssandra [29.7K]

Answer:

-Sensors in the brain detect a lack of oxygen.

-The muscles in his body need more energy and therefore more oxygen.

Explanation:

-Sensors in the brain detect a lack of oxygen.

-The muscles in his body need more energy and therefore more oxygen.

-The body has too little carbon dioxide to maintain function.

-The body is using carbon dioxide instead of oxygen to make energy.

-Blood pressure has decreased, so less blood is being pumped to the muscles.

<em>The correct answer would be that </em><em>sensors in the brain detect a lack of oxygen</em><em> and t</em><em>he muscles in the body of Jon need more energy and therefore, more oxygen.</em>

At sea level, the atmospheric pressure easily allow oxygen to permeate the cells of the lung and diffuse into the blood. At high altitudes, air pressure is generally lower and permeation/diffusion through the cells of the lung into the blood becomes difficult.

<u>Without adequate oxygen, the body cannot generate energy needed for physical activities of muscles. Consequently, the sensors in the brain detect a lack of oxygen and the body system reacts by breathing heavily to compensate for the oxygen shortage.</u>

6 0
3 years ago
Other questions:
  • What makes up all of the living and nonliving things that surround and support you? the atmosphere. the soil. the troposphere. t
    14·2 answers
  • The diaphragm adjusts the ____________ on a light microscope.
    9·1 answer
  • The term anatomy refers to _____.
    6·1 answer
  • 6. The skeletal structure shown would be classified as part of which of the following?
    14·2 answers
  • Study the image of moss and identify the label that describes rhizoids.
    12·1 answer
  • The atmospheric concentration of carbon dioxide increased from 278 ppm in 1790 to 383 ppm in 2007. What is the approximate perce
    15·1 answer
  • A fleshly, enlarged end of rhizome or stolon is called a _____.<br> -bulb<br> -tuber<br> -corm
    5·2 answers
  • Help ! Help ! Help ?
    9·1 answer
  • If the mother of a child has the recessive gene for cystic fibrosis (Cc), an autosomal disorder, and the father does not (CC), w
    12·1 answer
  • Need ASAP please help answer choices at bottom
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!