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4 years ago

What iswrong with this explanation of how

Biology

1 answer:

miss Akunina [59]4 years ago

4 0

Answer:

When bacteria are exposed to an antibiotic, such as penicillin, they often mutate.

Explanation:

This means that part of their DNA changes, giving the antibiotic resistance to the bacteria.

In this way, the bacteria can generate a copy of their DNA and transmit it to their offspring, giving their resistance.

On other occasions, a resistant bacterium dies from causes unrelated to the antibiotic, leaving its DNA free.

If other bacteria manage to capture that DNA, it will also acquire antibiotic resistance.

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Examples of uniformly integrable martingales site:math.stackexchange.com

Naddika [18.5K]

<span>Examples of uniformly integrable martingales are very important</span>

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3 years ago

I will give brainly to first one to answer

Alekssandra [29.7K]

1. Venus - this planet has a dense atmosphere of carbon dioxide

2. Planets - these celestial bodies shine by reflected light

3. Jovian planets - Jupiter, Saturn, Uranus, Neptune

4. Mercury - planet closest to the sun

5. Comets - these members of the solar system are made of ice and dust

6. Asteroids - these masses of rock orbit between Mars and Jupiter

7. Axis - the Earth rotates on this

8. Orbit - a revolution around the sun

9. Terrestrial planets - Mercury, Venus, Earth, Mars

10. Mars - this planet is referred to as the "red" planet

3 0

3 years ago

Suppose you are an astronomer, and a child asks you to explain how long it takes light to travel through space. In your own word

densk [106]

Light speed, or 300,000 kilometers a second, might seem like a speed limit, but this is just an example of 3 + 1 thinking – where we still haven’t got our heads around the concept of four dimensional space-time and hence we think in terms of space having three dimensions and think of time as something different.

For example, while it seems to us that it takes a light beam 4.3 years to go from Earth to the Alpha Centauri system, if you were to hop on a spacecraft going at 99.999 per cent of the speed of light you would get there in a matter of days, hours or even minutes – depending on just how many .99s you add on to that proportion of light speed.

This is because, as you keep pumping the accelerator of your imaginary star drive system, time dilation will become increasingly more pronounced and you will keep getting to your destination that much quicker. With enough .999s you could cross the universe within your lifetime – even though someone you left behind would still only see you moving away at a tiny bit less than 300,000 kilometres a second. So, what might seem like a speed limit at first glance isn’t really a limit at all.

To try and comprehend the four dimensional perspective on this, consider that it’s impossible to move across any distance without also moving through time. For example, walking a kilometer may be a duration of thirty minutes – but if you run, it might only take fifteen minutes.

Read more at: <span>https://phys.org/news/2011-10-light-speed.html#jC</span>

5 0

3 years ago

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to

galina1969 [7]

From the given information above, the answer would be that type O blood is not dominant. To explain this, all blood types consist of genotypes and these genotypes consist of two letters. For blood type A (A, i) and (A, A); for blood type B (B, i) and (B, B); For blood type AB, there is only one which is (A, B) as well as for O which is (i, i). The capital letters are considered as the dominant whereas, the lowercase letters are recessive. So to conclude, blood type O is a recessive blood type. Going back to the information given, the father is blood type A which is (A, i) whereas the mom has a blood type O (i, i) and the daughter is also blood type O (i, i). Therefore, what the daughter got from his dad is i, and another i from the mother, which makes her having a blood type O.

3 0

4 years ago

Which one is NOT one of the properties of water?

marysya [2.9K]

Answer:

a. the frozen form is more dense than the liquid form

Explanation:

The remaining properties are exhibited by water and are described as follows.

b. the frozen form is less dense than the liquid form

1. Water freezes to form ice.

2. When ice is put in water, ice starts floating in water and is visible.

3. If the density of ice was greater than water, ice would have got sunk and go downwards in the water body.

4. Hence, ice which is frozen form of water, has less density than water.

c. water is a solvent

1. The solvency is defined as the ability of a liquid to dissolve a substance.

2. Water is called the universal solvent. This means water can dissolve almost all types of substances.

3. Water is a polar solvent. The polar water molecules have the ability to break down both ionic and covalent bonds.

d. water has a high heat capacity

1. This is defined as the amount of heat needed by 1 gram of a substance so that its temperature is changed by 1 degree centigrade. The heat can either be gained or lost for the temperature to change.

2. The heat required by 1 gram of water to either increase or decrease the temperature of water is called the heat capacity of water.

e. water has a high heat of evaporation

1. This is defined as the amount of heat needed by 1 gram of a substance so that it changes its state from liquid to gas.

2. The heat required to convert 1 gram of water into vapours is called the heat of evaporation of water.

3. 1 g of water when heated at 25 centigrade needs 580 calories of heat to convert into gas.

All the above properties of water show the importance of water for life.

7 0

3 years ago