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Andreas93 [3]
3 years ago
5

A population of bacteria sees an increase in the number of bacteria resistant to a certain antibiotic over a number of generatio

ns. This is known as ______________.
Biology
1 answer:
Y_Kistochka [10]3 years ago
6 0

Answer: MICROEVOLUTION

Explanation: Microevolution simply means those changes in the alleles frequencies of an organism over time.

In other words,we will say that microevolution is the generation to generation change in a population's frequencies of alleles.

These changes can occur due to natural or artificial selection,

Gene flow, mutation and genetic drift.

From the question asked,when a population of bacteria sees an increase in the number of bacteria resistant to a certain antibiotic over a number of generations,it is simply known as microevolution.

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Which statement best explains why Earth's lithosphere is broken into tectonic plates?
Nadusha1986 [10]

Answer:

( d ) The brittle lithosphere cracks under pressure from the moving asthenosphere.

Explanation:

~ The earth's crust refers to the outer layer of the planet earth . The surface of a planet is usually formed of less dense material than the deeper layers. Only 1/3 of the earth's crust is terrestrial , the rest is covered by oceans . The thickness of the earth's crust is between 10 to 30 miles.

The earth's crust, which is the upper part of the lithosphere , is divided into two layers. The top layer is continental , which is composed of granite . While under granite is a layer of hard rock called basalt .

On a semi-liquid planet , such as Earth , the earth's surface floats on top of the liquid inner layer. The crust seems to be often divided into pieces known as tectonic plates which due to the movement of molten magma beneath it, are able to move. This is a phenomenon of continental drift theory . In addition, collisions between two tectonic plates can produce volcanoes .

The Earth's crust is made up of rocks, minerals, soil and fossil fuels.

6 0
2 years ago
A collection of ideas and beliefs that sound like science but not supported by evidence, such as bigfoot, is known as...
Brut [27]

Answer:

pseudoscience

Explanation:

In nature, some ideas, beliefs or knowledge are mistaken to be scientific but in actual sense they are not supported by evidence using scientific method. These sorts of ideas are called PSEUDOSCIENCE. They do not follow the scientific method principles, hence, cannot be tested scientifically.

Pseudoscience is termed "fake science" as the name implies because they are brought forth as science in order to justify their claim but they are not in consistency with the scientific method. They lack the ability to be tested as false via experimentation. An example of pseudoscience as stated in the question is Bigfoot

5 0
3 years ago
A cylinder with a mass of 12 g has a radius measuring 2 cm and a height of 6 cm. What is its density? 0.05 g/cm3 0.16 g/cm3 1 g/
valina [46]
Given:
m = 12 g, the mass of the cylinder
r = 2 cm, the radius of the cylinder
h = 6 cm, the height of the cylinder.

Calculate the volume, V, of the cylinder.
V = πr²h
   =  π*(2 cm)²*(6 cm)
   = 75.398 cm³

By definition,
density = mass/volume.

Therefore,
density = m/V
             = (12 g)/(75.398 cm³)
             = 0.159 g/cm³
             = 0.16 g/cm³ (nearest hundredth)

Answer: 0.16 g/cm³

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3 years ago
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