In the 1970's, what element wasremoved as an additive from
gasoline?
A. copper
B. zinc
C. palladium
D. lead

Answers

Answer 1

Answer:

Finally, in 1972 the U.S. Environmental Protection Agency announced that leaded gasoline would be phased out.

What is Gasoline?

Petroleum-derived combination of flammable, volatile liquid hydrocarbons used as fuel for internal combustion engines; often spelled gasolene, gas, or petrol.

Additionally, it serves as a fat and oil solvent. Because of its high energy of combustion and ability to mix easily with air in a carburetor, gasoline—originally a byproduct of the petroleum industry, with kerosene being the main product—became the favored fuel for automobiles.

Not specifically to combat lead poisoning but because lead was known to interfere with new smog-reducing catalytic converters that from 1975 would be built into new cars.

Therefore, Finally, in 1972 the U.S. Environmental Protection Agency announced that leaded gasoline would be phased out.

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Answer 2

Answer:

Answer:

According to 1988

the lead phase out in united state of American

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Draw a diagram of a virus and label the parts

Answers

Answer:

The diagram of the virus is given below.

Explanation:

Virus may be defined as the simple organism that contain DNA or RNA as their genetic material, surface area is covered with protein coat. Body is divided into head, neck collar and tail fibers. Virus requires a host organism for its growth and reproduction. Virus can affect plants, animals, bacteria and microorganisms.

Viruses are very small, typically between 20 and 300 nanometers in diameter and are so small that they can only be seen with an electron microscope.

How do we explain?

Viruses are not considered to be living organisms because they do not have their own metabolism. They need to infect a host cell in order to reproduce. Once a virus infects a host cell, it takes over the cell's machinery and uses it to make more copies of itself.

Viruses can cause a wide variety of diseases, including the common cold, the flu, and AIDS. There is no cure for most viral diseases, but there are treatments that can help to relieve the symptoms.

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A ________ is a membrane-bound sac found in cells that contains digestive enzymes which break down complex molecules or structures.

Answers

The answer is lysosome :)

A Lysosome is a membrane-bound sac found in cells that contains digestive enzymes which break down complex molecules or structures.

A scientist who conducted an experiment obtained an unexpected result. What will she most likely do with the unexpected result?

Answers

Experiment furthers to confirm the result, and examine it's possible effects.

6. Which of the following correctly identifies DNA and RNA?A.
ribogenome
B.
riboamino acid
deoxygenome
deoxyamino acid
deoxyribonucleotide
deoxyribonucleic acid
C.
riboamino acid
D.
ribonucleic acid

Answers

Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA)

Answer:

Explanation:

riboamino acid

A relationship where one organism lives in or on another organism for the purpose of getting energy

Answers

This would be paratisitism. One organism, the one that is getting the energy, is called the parasite, and the other, the one from whom the energy is taken, is called the host.

an example is human (host) and tapeworm (parasite)

The diploid number of chromosomes in one human somatic cell is: TEST IS TIMED!! 23 pairs of chromosomes 23 pairs of alleles two alleles in a genotype 23 chromosomes 46 pairs of chromosomes