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damaskus [11]
2 years ago
12

What information did scientists use when developing the geologic timescale?

Biology
2 answers:
IgorC [24]2 years ago
8 0

Scientists studied the fossil record. They found four major changes in life forms. These four major changes were used to mark when one geologic era ended and the next began.

Keith_Richards [23]2 years ago
7 0
<span>Scientists first developed the geologic time scale by studying rock layers and index fossils through out the whole world. With this information, scientists placed Earth's rock layers in order by relative age. Later, radioactive dating helped determine the absolute age of the divisions in the geologic time scale.</span>
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Jonah observes the Sun through a special filtered telescope during a total solar eclipse. He sees a red ring and a faint white r
rewona [7]
<span>The part of the sun that Jonah is seeing as he observes the sun through a filtered telescope during the total solar eclipse is that the red ring is the chromosphere and the faint white ring that looks like a crown is the corona.</span>
5 0
3 years ago
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identify a probable reason that the dark moths survived while the light moths did not during the industrial revolution
nignag [31]

Answer:

directional selection

Explanation:

The directional selection is a type of Darwinian selection where a particular phenotype is favored in the population, thereby modifying the allelic frequencies to increase the proportion of the favored phenotype. <em>Biston betularia</em>, also known as peppered moth, is a species that was influenced by directional selection in its recent past. Before the industrial revolution, the frequency of light-colored moths was predominant compared to the darker-colored phenotypes, because this color has higher adaptive fitness in a clean, no pollution environment, thereby light-colored moths were able to avoid predatory birds. However, during the industrial revolution, the frequency of dark-colored moths increased in response to pollution (i.e. darker environment), thereby conferring a higher adaptive fitness to darker phenotypes.

5 0
2 years ago
Which terms are associated with the conservation of mass? Select all that apply.
Maslowich
Equal and persevered transformed
7 0
3 years ago
Why was it profitable for General Motors and Ford to integrate backward into component-parts manufacturing in the past, and why
Fynjy0 [20]

Answer:

Why was it profitable?

(1) To control the quality of their spare parts.

(2) To reduce cost.

Why do they buy more parts outside?

(1) Inefficient in-house parts manufacturing.

The cost of managing Internal

(2) manufacturing of Automobile parts has increased.

Explanation: General motor and Ford are both world class Automobile manufacturers with several vehicles in every part of the world, General motors have its assembly plant in about 120 countries of the World.

During the early 20th Century they found that the local suppliers were unable to meet their Demand in terms of Quality and quantity and it was very expensive. So they started a backward integration to help regulate the quality,meet their Demand and save cost.

In recent times between the late 20th Century till recent times they buy more parts from external suppliers because the cost of managing Internal manufacturing became high because of labor costs and inefficiency caused by lack of competition and Japanese manufacturers have been able to meet their requirements.

8 0
3 years ago
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geniusboy [140]

Answer: In lab, we used Benedict's reagent to test for one particular reducing sugar: glucose. Benedict's reagent starts out aqua-blue. As it is heated in the presence of reducing sugars, it turns yellow to orange. The "hotter" the final color of the reagent, the higher the concentration of reducing sugar.

7 0
3 years ago
Read 2 more answers
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