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sattari [20]
3 years ago
11

While most bacteria are eliminated by antibiotics, some can possess mutations that are resistant to antibiotics, leading to more

drug-resistant strains of bacteria. Such a mutation is an example of which of Charles Darwin's proposed criteria for traits to evolve through natural selection?
The trait must make the individual more fit to survive. T/F
Biology
1 answer:
Papessa [141]3 years ago
3 0

Answer:

The trait must make the individual more fit to survive. True

Explanation:

Darwin proposed that genetic variations are present in natural populations. Some genetic traits become beneficial under the changed environmental conditions. The organisms with these genetic traits are able to survive and reproduce better than the organisms that lack them. This results in an increased proportion of the beneficial genetic traits in the population over generations as the individuals having those traits reproduce more.

The presence of antibiotic resistance is a beneficial genetic trait that allows bacteria to survive in the presence of antibiotics. Natural selection favors the bacterial having antibiotic resistance and increases their proportions in the population over generations.

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o-na [289]
<span>The correct answer should be d. The rainforest is important to life as a whole on the planet. Without them the global warming phenomenon would skyrocket because of massive spikes of carbon dioxide that is man made. Without them the animal biomes would also get destroyed because suddenly thousands and thousands of species would be left without a home so you would disrupt nature. Without them the Earth would be ravaged by bad things.</span>
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3 years ago
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Explanation:

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8 0
4 years ago
g If a colony of bacteria starts with 1 bacterium and doubles in number every 20 ​minutes, how many bacteria will the colony con
Lynna [10]

Answer: 2.81 x 10∧14 baterias after 16 hours.

Explanation:

Hi, first we have to find how many 20 minute intervals are in 16 hours.

If 1 hour = 60 min, 16hours = 960 minutes (16 h x 60 min / 1 h)

If we divide the 960 minutes (16 hours) by 20 minutes we obtain 48. (960/48)

There are 48 twenty minutes intervals in 16 hours.

Now we have to apply the exponential growth formula:

P (t) = Po (1 +r) ∧t

Where:  

P (t) = population at time t  

P (0) = initial population (1)

r = growth rate (1)

t = time (48)

Replacing with the values given:

P (t) = 1 (1 + 1) ∧48= 2.81 x 10∧14

2.81 x 10∧14 baterias after 16 hours.

7 0
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stiv31 [10]

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Explanation: Because that’s what US Test Prep said was right.

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