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makvit [3.9K]
3 years ago
7

Based on figure 19-4, what is the student probably trying to test?

Biology
1 answer:
Masteriza [31]3 years ago
3 0
The student is trying to see which substance (disinfectant 1, 2, 3, or the distilled water) can disinfect the most.
You might be interested in
Select the correct answer.
Lena [83]
The correct answer is D, white blood cells.
We know that red blood cells deliver nutrients and are not apart of the immune system; platelets are responsible for coagulation, which has nothing to do with the immune system, and plasma is a substance that, again, has nothing to do with immunity. White blood cells are the only things that fight disease (antibodies are white blood cells)!

I hope I helped!

(By nothing I meant very little to none).
7 0
3 years ago
Read 2 more answers
10.
Gre4nikov [31]
I believe heterotrophs are organisms that get their energy by eating other organisms. These organisms are also called predators
3 0
2 years ago
Which statement is true about nuclear decay
Readme [11.4K]

Answer:

Nuclear decay rates are constant

Explanation:

Spontaneous decay of unstable nuclei is a process of a statistical nature, it is not possible to predict with certainty when an individual radioactive nucleus will decay, nor can the decay process be influenced in any way.

Therefore, the half-life of radionuclides (specific for each radionuclide) is defined as the time period in which half of the initial number of radioactive nuclei decays.

The unit of measurement for the radioactivity of the material is the becquerel (Bq) and denotes the number of decays in one second (1Bq = 1 decay / 1 second).

5 0
3 years ago
A farmer wanted to rid his apple trees of a particular leaf-eating insect. he sprayed his trees with an insecticide that killed
marta [7]
The survival of the 2 percent of the population is due to the presence of a gene obtained from other species. This gene must be responsible for developing resistance in the insects, against the insecticide that was used by the farmer. The gene got incorporated in only 2% of the insects and therefore, they survived and rest of them were susceptible to the insecticide and thus, died. 
7 0
3 years ago
The difference between the highest high tide and the lowest tide is called the
Drupady [299]

I think the answer is most likely A

6 0
3 years ago
Read 2 more answers
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