which of the following has made it possible for humans to travel long distances throughout their history?

Answers

Answer 1
Answer: the development of transportation and navigation technologies...that was a standard question in my school....

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The approximate composition of the atmosphere is shown in the pie-chart. Which statement BEST describes the chart? A) The chart shows the percentages of elements in a mixture. B) The chart shows the percentages of elements in a compound. C) The chart shows the percentages of pure substances in a mixture. D) The chart shows the percentages of compounds in a pure substance.

A scientist discovers a new object in the Kuiper Belt and claims it is a dwarf planet. What would have to be true about the object for the scientist to be correct?

Answers

For the scientist to be true, this planet has to: be in the direct orbit of the sun, to have enough gravity to crush into an equilibrium shape. The difference between a dwarf planet and a planet consist in the fact that the  planet has  ``cleared the neighborhood``, a scientific expression= it has become gravitationally dominant, that only its satellites are under its gravitational influence. Because the dwarf planet has not ``cleared the neighborhood``, it is classified as a dwarf planet, not a planet.

Answer:

The object would have to be spherical, orbit the Sun, and be traveling in a path with other objects.

Explanation:

i got it right on enginity, hope this helps.

What is a missense mutation

Answers

The correct answer is - A. A mutation that causes the code for the wrong amino acid.

The missense mutation is a type of mutation that affects the amino acids of the organisms. This mutation results in a codon that codes a different amino acid rather than the one that should be coded. Because of this it causes a synthesis of a protein with altered amino acid sequence during translation. This type of mutation is basically a change in one DNA base pair that results in the substitution of one amino acid for another one.

Answer:

The right choice is (A) mutation that causes the code for the wrong amino acid.

Explanation:

In cell biology during  when a missense mutation occurs in a DNA molecule, it varies in one of the RNA codon sequences which are made during transcription. The  difference produced in codon will then cause a different amino acid to be inserted into a protein during translation process so we can say that a missense mutation is a point mutation in which a single nucleotide change results in a codon that codes for a different amino acid

Darwin collected an studied many specimens to understand natural selection on the Galapagos islands. which organisms did he study while he was there

Answers

Answer:

C and D or it might just be C

Explanation:

He chose to study birds, plants, and animals. Mostly 2 types of Finches.

What factors would affect the length of a day?How would the length of the day affect the temperature?

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The length of the day would affect temperature became at night, it gets cold, and during the day, it's warmer. The length of the day would make it warmer or colder earlier or later. I hope that makes sense!

How does blood help maintain homeostasis in the body?

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The blood is the means by which circulating several fundamental chemicals to the body balance. Consumptiom metabolism, control and structural depend on the exchange of various substances with the environment, like oxygen, carbon dioxide, glucose, amino acids and nucleic acids. Is the blood these exchanges are guaranteed. In addition, several defense cells of the organism (macrophages and lymphocytes) are present stop are essential and in the bloodstream for homeostasis. These and many other many defined do make blood a factor of great importance for the living.

hope this helps!

Sources of electrical energy include what?

Answers

Sources of electricity were fossil fuels 67%, renewable energy 16% (mainly hydroelectric, wind, solar and biomass), and nuclear power 13%, and other sources were 3%.