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Taya2010 [7]
3 years ago
15

Life on earth began as the product of chemical reactions which occurred

Biology
1 answer:
Kazeer [188]3 years ago
7 0

Answer: Over 4 billion years ago

Explanation: The chemical reactions between carbon and water is said to bring about life according to scientists. These reactions builds largely upon four families of chemicals (lipids, carbohydrates, amino acids, and nucleic acids).

However, the actual time of life on Earth has varying speculations from different scientists in fields of study (such as molecular biology, chemistry, oceanography, etc).

Furthermore, microfossils within hydrothermal-vent precipitates dated from 3.77 to 4.28 billion years is presumed to inhabit the oldest record of life on Earth. Hence, which is presumed to have occurred after ocean formation 4.4billion years ago.

Thus, the actual date of the chemical reactions that brought about life is not rigid, but presumed to have occurred over 4billion years ago (according to research).

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How are populations of blue winged warblers most likely to be affected by the earlier arrival of spring
Helga [31]
<h2>Answer:</h2>

Blue winged warblers are the popular species having distinct Buzz Buzz sounds. They are most likely to live in bushy fields and known as worm eater. Their favorite food is insects and spiders.

As the springs arrives, it will affect the blue winged warbles in a very positive way. They will be more likely to reproduce in spring. They will also find more food and shelter in spring.

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3 years ago
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What would be a negative impact on the enviroment from a large-scale mining effort in the ocean
Anna11 [10]

Answer:

The oceans could become polluted with oil, coal, and other contaminents that would come about when mining in such a grand scale

Explanation:

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3 years ago
Explain how carbon, hydrogen, and oxygen are conserved as<br> they move through the ecosystem.
madreJ [45]
They move through the ecosystem
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3 years ago
A fruit fly has diploid cells with 8 chromosomes. Explain how many chromosomes are in its haploid gametes
Y_Kistochka [10]

Answer:

4

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Diploid means 2n

Haploid means n

Here we have 2n=8 (because fruit fly has diploid cells with 8 chromosomes) to get to n which is haploid divide by 2, you get n=4

8 0
3 years ago
How does the endocrine system control body processes? WORTH 20 POINTS
Sidana [21]

Answer:

The endocrine system is made up of glands that produce and secrete hormones, chemical substances produced in the body that regulate the activity of cells or organs. These hormones regulate the body's growth, metabolism (the physical and chemical processes of the body), and sexual development and function.

Explanation:

The endocrine system is responsible for regulating a range of bodily functions through the release of hormones.

Hormones are secreted by the glands of the endocrine system, traveling through the bloodstream to various organs and tissues in the body. The hormones then tell these organs and tissues what to do or how to function.

Some examples of bodily functions that are controlled by the endocrine system include:

metabolism

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sexual function and reproduction

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appetite

sleeping and waking cycles

body temperature

Endocrine system organs

The endocrine system is made up of a complex network of glands, which are organs that secrete substances.

The glands of the endocrine system are where hormones are produced, stored, and released. Each gland produces one or more hormones, which go on to target specific organs and tissues in the body.

The glands of the endocrine system include:

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