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PSYCHO15rus [73]
3 years ago
13

What is the most effective approach the government can take to keep the air cleaner

Biology
1 answer:
stiks02 [169]3 years ago
4 0
Create and enforce regulations that limit fossil fuel burning by industries. use funds to understand why smoke and mold are causes of outdoor air pollutants. educate people about the threats to outdoor clean air from visible forms of air pollution.
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E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA
White raven [17]

Answer:

Option (d).

Explanation:

DNA is the genetic material of all the organism except some viruses. DNA is composed of nitrogenous base, deoxyribose pentose sugar and the phosphate group.

DNA replicatese by semi-conservative mode of replication in which one the daughter DNA consists of one newly synthesized strand and one parental strand. This mode of replication was explained by Messelson and Sthal experiment. The cells from 15N medium are transferred to 14N medium the band of intermediate density was observed. The daughter DNA consists of one 15N DNA strand and one 14N DNA strnd. This strand undergo replication in the 14N medium. This time one low density DNA band ( contains 14N - 14N DNA strand) and one intermediate density band ( 14N-15N DNA).

Thus, the correct answer is option (d).

8 0
3 years ago
During winter, tree sap can sometimes freeze and cavitation (the formation of an air pocket) may occur. Which one of the followi
SVETLANKA909090 [29]

Answer:

Option 3. cohesion transpiration is the correct answer.

Explanation:

Plants release water through transpiration while cohesion is responsible for moving more water throughout the xylem. When the water evaporate through the stomata, more water is pulled from roots into stem and eventually reach the leaf this process is called transpiration-cohesion theory.  (More explanation in attached Picture)

8 0
2 years ago
Why can rats smell almost three times more compounds than humans?
Hunter-Best [27]
<span>The smell of Danger.
Researchers have discovered a single compound found in high concentrations in the urine of carnivores that triggers an instinctual avoidance response in mice and rats. This is the first time that scientists have identified a chemical tag that would let rodents sense carnivores in general from a safe distance.</span>
4 0
3 years ago
What color on the pH paper indicates that an acid has formed?​
pishuonlain [190]

Answer:

red

Explanation:

3 0
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Do a Xylem...
GREYUIT [131]

Answer:

Carries water

Explanation:

6 0
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