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horsena [70]
3 years ago
13

You are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to rad

iation. Which of these methods of obtaining data should you most likely adopt and why?
a. an observational study because it involves the pre-existing condition of the subjects
b. an experimental study because it will give the most accurate results
c. an experimental study because results can be obtained much faster using this technique
d. a sample survey with only people who were not exposed to radiation because it involves random selection
e. a sample survey with only people who were exposed to radiation because it involves random selection
Biology
2 answers:
Cerrena [4.2K]3 years ago
6 0
If you are conducting a study on the health of people who have been exposed vs not exposed, the method you should use to obtain data would be an observational study because it involves the pre-existing condition of the subjects.
kenny6666 [7]3 years ago
4 0

Answer:

Option A, An observational study because it involves the pre-existing condition of the subjects

Explanation:

In an observational study, a researcher's aim is to observe the effect of an unusual condition, medicine, treatment, or any other intervention on the subject of the experiment without differentiating whether the subject was ever exposed to any such condition or not. Also, this kind of study involves study of pre-exposure condition as well thus, it becomes easy to identify what are the impacts of any treatment/medicine/unusual condition.

Hence, option A is correct.

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777dan777 [17]

Answer:

(B) HEK cells exposed to the most hypotonic conditions will display the greatest degree of AQP5 membrane localization, allowing water to flow into the cells.

Explanation:

The function of AQP5 (an aquaporin) is to allow the water to move into or out of the cell down the concentration gradient. When placed in hypotonic solutions, the internal environment of HEK cells will be hypertonic. Water always moves from hypotonic (higher water concentration) to hypertonic (lower water concentration) solution.  

Hence, the HEK cells exposed to the hypotonic conditions will localize AQP5 in their membranes to allow the water to move from out hypotonic conditions to the inner hypertonic environment.  

7 0
3 years ago
Choose the correct term for each definition or example.
mrs_skeptik [129]

Answer:

These are the following answers to the items:

Pinocytosis -cell engulfs molecules in cell "drinking"

Facilitated diffusion- molecules helped by protein; move insoluble molecules

across plasma membrane

Passive diffusion- molecules move in and out freely from high to low concentration

Phagocytosis- cell engulfs microorganisms in cell "eating"

Active transport- molecules "pumped" in or out from low to high concentration

Passive diffusion- oxygen, carbon dioxide

Active transport- transports sodium, potassium

Pinocytosis- transports glucose, amino acids

Explanation:

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8 0
3 years ago
Mayfly Larva are sensitive to pollution. What would happen if a disaster struck such as pollution in the stream? SELECT ALL THAT
svp [43]

Answer:

<em>Organisms that are eaten by the mayfly will increase.</em>

<em>Organisms that eat mayfly will decrease at first.</em>

<em>Organisms that eat mayfly would consume more of other organisms in their diet</em>

Explanation:

her get killed or they will migrate from the stream that is polluted. The population of the organisms on which the mayfly larva fed would increase as it will have a lesser number of predators now.

On the other hand, the organisms which fed on the mayfly would decrease at first as they will have a lesser amount of food available. They might find another source of food in order to survive.

4 0
4 years ago
The following picture is best described as a(n) <br><br><br> Helppp
crimeas [40]

Answer:

Explanation:

A

7 0
2 years ago
Which advancement in technology has helped cut down on waste
marin [14]
<span>The question above is incomplete. The options attached to the question are as follows:
 A) Milk cartons
B.) Computer monitors
C.) Disposable tapes
D.) E-mail

ANSWER
 The correct option is D.
   Before the advent of e-mail, huge amount of papers are used in the process of writing letters. The writing materials,the envelopes and the stamps are all made of paper and this led to a great waste as the papers have to be disposed after use.This is not the case with electronic mails. Electronic mails do not need paper at all and it has drastically reduce the amount of papers that is used in writing letters.</span>
8 0
3 years ago
Read 2 more answers
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