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sergey [27]
3 years ago
13

Question 20 of 32

Biology
2 answers:
Alina [70]3 years ago
6 0

Answer:

i giess its ans is option b

iren2701 [21]3 years ago
5 0

Answer:

I guess it's ans is option b

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Describe ways that a human society's culture, agricultural practices, and health practices would be shaped by living in an area
Pachacha [2.7K]

Active volcanoes can affect the properties of the soil (e.g., pH) and therefore may alter agriculture and health.

<h3>What are active volcanoes?</h3>

Active volcanoes are geological formations that have regular cycles of eruptions, releasing liquid magma to the Earth's surface.

These eruptions are composed of rocks (or ash weathers) that generate fertile soils, but also may affect the respiratory airways.

Volcanic eruptions have devastating consequences for human populations and lead to destruction as well as societal collapse.

In conclusion, active volcanoes can affect the properties of the soil (e.g., pH) and therefore may alter agriculture and health.

Learn more about active volcanoes here:

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8 0
1 year ago
Two formal terms used to describe categories of mutational nucleotide substitutions in dna are ________.
mamaluj [8]
Transversion and transition
6 0
3 years ago
A gel electrophoresis is performed, but when the gel imager is used, no bands appear. the researcher might have forgotten to: (c
Sladkaya [172]
The answer is;

a. add electric current.
b. add buffer solution

The process of gel electrophoresis taps on the property of net charges of molecules to ensure that they travel up the gel. Additionally, the buffer acts as the mobile phase for the molecules and also give molecules net charge as they travel through the gel. It is until the molecules reaches an isoelectric point,where the molecule has zero net charge, that they stops moving through the gel. This is how bands are formed.
7 0
3 years ago
Shell-builders use calcium carbonate molecules (CaCO3) to build their shells. Which of the choices above could be a source for t
Fudgin [204]

Answer:

The question is incomplete, the correct question is;

Shell-builders use calcium carbonate molecules (CaCO3) to build their shells. Which of the following choices could be a source for the carbon atoms in the calcium carbonate (CaCO3) molecules?

respiration by organisms such as plants, animals and microbes

burning coal

calcium ions

car exhaust

wildfires

Answer is all of the above options except calcium ions.

The source for the carbon atoms in the calcium carbonate (CaCO3) molecules include respiration by organisms such as plants, animals and microbes , burning coal , car exhaust  and wildfires.

Explanation:

Shell-builders (coral, oysters, lobsters, sea urchins, phytoplankton) utilize calcium carbonate molecules (CaCO3) to build their shells. The respiration process by organisms such as plants, animals and microbes, burning of fossil fuels, vehicle exhaust, wild fire etc produces carbon dioxide (CO2) and release it into the atmosphere. Oceans absorb carbon dioxide in the air by diffusing and dissolving it into the surface water. The amount of CO2 that dissolved in the water depends on concentrations of CO2, temperature of the water, wind, etc.

Phytoplanktons (microscopic, one-celled organisms) also bring carbon into the ocean from the air through photosynthesis, where they convert the carbon dioxide and water into glucose and other carbon compounds. These carbon compounds are consumed by the marine organisms and some carbon eventually ends up in deep seafloor sediments. The other processes which involved in the transfer of carbon from the air into deep seafloor sediments include photosynthesis , decomposition , waste products, etc.

The CO2 dissolved in the ocean combines with water molecules to produce carbonate (CO3-) ions, which then combine with calcium ions in the seawater to form calcium carbonate (CaCO3). This calcium carbonate is used by shell building organisms to build their shells, plates, inner skeletons etc.

8 0
2 years ago
Select an example of an open system.<br> A.) earth<br> B.) the atmosphere<br> C.) the water cycle
Gekata [30.6K]

Answer:

A. THE EARTH

Explanation:

8 0
2 years ago
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