1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Igoryamba
3 years ago
14

Which of the following is an example of a natural source of air pollution? A. Mining releases gases trapped beneath Earth's surf

ace. B. Burning coal and natural gas releases carbon dioxide. C. Erupting volcanoes release many toxic gases. D. Plowing and harvesting crops releases dust particles.
Biology
2 answers:
MissTica3 years ago
8 0
C.erupting volcanoes release many toxic gasses.
sattari [20]3 years ago
4 0

The correct answer is (C) Erupting volcanoes release many toxic gases.

Air pollutants are gases that harms the environment and human health. Some air pollutants come from volcanic eruption are toxic( like sulphuric acid) and harm our health. Volcanic eruption produce soot and ash into the atmosphere , which reduces sunlight and lowers temperatures. Eruption also produce carbon dioxide, carbon monoxide and other polluting gases

Some other examples of natural air pollutants are:

1. Radon is a radioactive gas that seeps from the ground in some areas, and fog and mist are both dense water vapor at ground level that obscures vision. 2. Ozone, a chemical formed naturally by the action of sunlight on oxygen, is a pollutant at ground level but beneficial in the upper atmosphere. It damages plants and causes breathing problem in the lower atmosphere.


You might be interested in
The ozone layer protects life on Earth by absorbing harmful ultraviolet radiation. The ozone layer is located between 17 kilomet
Zolol [24]
The correct answer is (2) - Stratosphere. Ozone is found in the stratosphere , a layer beginning between 6 and 10 miles above the earth's surface and extends upward to about 30 mile above the surface of he earth. The ozone that is found in the stratosphere absorbs most of he harmful ultraviolet sunlight and is thus called the "good ozone" Ozone is also found in the lower region of the atmosphere known as the troposphere. But the ozone here strongly reacts with molecules causing toxicity in plants. The ozone is therefore termed as "bad ozone."
8 0
3 years ago
An allosteric protein demonstrates a decrease in its Kg for molecule Y as the concentration of molecule X increases. Based on th
djyliett [7]

Answer:

X is negative heterotropic modulator

Explanation:

In allosteric regulations, modulators are molecules that causes a change in the conformation of an enzyme, hence, resulting a change in enzyme activity. It can lead to a decrease or an increase of the enzyme.  When a molecule decreases the enzyme activity it called a negative modulator, when it increases or activates the enzyme activity, it is called a positive modulator.

A positive or negative modulator can either be homotrophic (substrate acts as modulator) or heterotropic (another ligand acts as modulator).

In the example above, X is negative heterotropic modulator, because the modulator is different from the substrate and it also decreases the enzyme activity.

4 0
3 years ago
Water has special characteristics because of the nature of hydrogen bonds what are they?
Amanda [17]

Water has special characteristics because liquid water is denser than ice and ice floats on top of liquid water​.

Answer: Option A & D

<u>Explanation:</u>

A water molecule is formed by the covalent bonding between two atoms of Hydrogen atom with one atom of Oxygen. In water, the Hydrogen bonds are the one that keeps the water molecule intact.  

When the water molecule freezes the bonding becomes weak as they are separated and set apart which makes the liquid water denser than ice. Normally a substance floats if it is less dense. Ice floats because it is less dense than water.  

5 0
3 years ago
How do mutated tumor suppressor genes affect the cell cycle?
Marrrta [24]
Tumor suppressor genes encode for proteins that inhibit or slow the progression of the cell cycle through a specific stage.they also encode for check point control proteins that arrests the cell cycle if the DNA is damaged or the chromosomes are abnormal. Mutation in the tumor suppressor genes that cause a loss or decreased function would lead to uncontrolled cell cycle leading to abnormal proliferation and the cell may become cancerous.
8 0
3 years ago
In boiling water, water molecules move apart and escape tin the form of water vapor. The process is called __
Leokris [45]

Answer: Evaporation

Explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Proteins are polymers made of amino acids.<br> true or false?
    12·2 answers
  • Which of the following statements is true?
    10·2 answers
  • Differences between food of male and female mosquito in detail<br>​
    12·1 answer
  • Which of the following will be the most similar?
    8·2 answers
  • Which spheres are involved when sedimentary rocks form from parts of sea shells at the bottom of the ocean?
    14·2 answers
  • Which nonmetallic minerals are most likely to be of high market value?
    11·1 answer
  • In the taxonomic system, genus is a subdivision of family.<br> True<br> Оr<br> False
    14·1 answer
  • List 5 anthropogenic climate change causes
    12·1 answer
  • Describe each organism in the food chain using ecological terms such as producer and consumer?​
    9·1 answer
  • All you need is in the photo ​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!