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Darina [25.2K]
2 years ago
6

What are antibiotics and how and why do they work?

Biology
1 answer:
netineya [11]2 years ago
5 0

Answer:

Antibiotics are medicines that help stop infections caused by bacteria. They do this by killing the bacteria or by keeping them from copying themselves or reproducing. The word antibiotic means “against life.” Any drug that kills germs in your body is technically an antibiotic.

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Negative of pest control methods.
Blizzard [7]

Answer:

Control methods

Biological pest control. Main article: Biological pest control. ...

Cultural control. Cultivation by ploughing exposes insect pests to predators such as black-headed gulls. ...

Trap cropping. Main article: Trap crop. ...

Pesticides. Main article: Pesticide. ...

Hunting. ...

Physical pest control. ...

Poisoned bait. ...

Fumigation.

5 0
3 years ago
During Evolution, a process of change over time, do individuals or populations evolve?
slavikrds [6]
Populations evolve.
3 0
3 years ago
How long will it take for 40.0 grams of Radium-226 (Ra-226) to decay to leave a total of 2.5 grams of Ra-226? Ra-226 has a half-
kolezko [41]

Answer:

6400 years

Explanation:

Given that;

N/No =(1/2)^t/t1/2

No = amount of radioactive material originally present

N = amount of radioactive material present at time t

t= time taken for N amount of radioactive material to remain

t1/2 = have life of the radioactive material

2.5/40 = (1/2)^t/1600

1/16 =  (1/2)^t/1600

(1/2)^4 = (1/2)^t/1600

4 = t/1600

t = 4 * 1600

t = 6400 years

3 0
3 years ago
What characteristic of plate movement makes it difficult for geologists to make short-term predictions about earthquakes
Lyrx [107]
The plate movements cause slips that occur at irregular intervals and often with a very lag period. That causes the plate movement make it difficult for the geologists to make a short-term prediction regarding the incoming earthquakes.
4 0
3 years ago
Population density is calculated by
Mumz [18]
Number of people per square mile.
Hope this helps
3 0
2 years ago
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