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NEED ANSWER ASAP Which statement about the earth’s atmosphere is true

ss7ja [257]

Answer:

In the past few decades, Carbon dioxide levels has been rising.

Explanation:

Rising levels of Carbon dioxide has become an immediate concern for the Environmentalists.
This is because carbon dioxide is a green house gas and risen levels of green house gases can lead to unusual warming up of the Earth's Atmosphere.
This phenomenon is termed as Global warming.
Global warming can lead to seasonal variation and melting of the ice caps to flood several continents.
In Last few decades The levels of Carbon dioxide is rising at an alarming rate.
This rise occurs due to the to burning of fossil fuels, combustion of fuels in automobiles, Deforestation etc
An immediate step is needed to check this addition of carbon dioxide.

3 0

3 years ago

Why might an individual with AIDS have difficulty fighting off otherwise harmless infections?

Fynjy0 [20]

Answer:

Having HIV/AIDS weakens your body's immune system. It destroys the white blood cells that fight infection. This puts you at risk for opportunistic infections (OIs). OIs are serious infections that take advantage of your weak immune system.

Explanation:

5 0

3 years ago

What pathway would most electrons follow inside an active mitochondrion?

mr_godi [17]

Answer:

The cycle of catabolic reactions of pyruvate is named the citric acid cycle. As a result, energy is produced in the form of NADH. It enters the electron transport chain from where energy is released along with oxygen. So the correct option is e.

7 0

3 years ago

Check my answer?

Goshia [24]

Yea you are right. Animal cells do not have cell walls though plant cells do have cell walls

5 0

3 years ago

Read 2 more answers

Please write down prearation of perment slides of pollen grains by acetolysis method and study of different pollen characters: s

zloy xaker [14]

Answer is given below

Explanation:

Collection and preservation of pollen material: In clean glass pots containing 70% glacial acetic acid, some of the stamens are applied with clean forceps prior to flower synthesis and sometimes protected from diamonds or mature flower buds.
Some polyologists recommend 70% ethyl alcohol to preserve feathers in place of glacial acetic acid. In this condition, pollen-filled feathers can be stored indefinitely. The wings are transferred to a centrifuge tube and rinsed well with distilled water.
the wings are crushed with a glass rod and the mixture is filtered through a cheesecloth or sieve. The lower part is recalled in the centrifuge tube. A freshly prepared acetolysis mixture containing acetic anhydride and concentrated H2SO4 (sulfuric acid) in a ratio of 9: 1 is poured into a centrifuge tube containing the washed pollen. Care must be taken to connect the conceider.
H2SO4 by acetic anhydride drop to prevent overheating. The acetolysis solution reacts violently with water. Glacial acetic acid washers are required to replace water with acetic acid, which does not react violently with the acetolysis solution.
Although the acetolysis process varies from pathologist to pulmonologist, the following approach seems to be the most appropriate. From the first to the last acetic acid wash, care is taken regardless of the water solution. Only distilled water should be used for washing to prevent contamination.

5 0

4 years ago