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Vadim26 [7]
3 years ago
10

You are the lucky student of a wacky professor who develops a time machine. She asks if you will test it with her. You get in an

d there is an immediate glitch - the date readout fails so that when you land you are not sure what eon/era you are in. As your time machine lands, you see an unusual landscape before you. As you open the door you realize you cannot breathe. You quickly shut the door, realizing you are in the ___________.
1) Archaean eon2) Cambrian period3) Cenozoic era4) Mesozoic era
Biology
2 answers:
scZoUnD [109]3 years ago
7 0

Answer:

1) Archaean eon

Explanation:  

Archaean eon  -

During the Archaean eon about 3.8 billion years ago, the earth's atmosphere was three times hotter than today's atmosphere. Earth's atmosphere was mainly more carbon dioxide and none of the Oxygen was in the atmosphere. In Archaean eon sedimentary rocks, stromatolites and first one-celled organisms appeared.

During Cambrian period sudden increase in diversity of many animal phyla was observed.

In Cenozoic era extinction of dinosaurs and rise of earliest homo sapiens has seen.

Semmy [17]3 years ago
6 0

Answer:

1) Archaean eon

Explanation:

In this geological period there is a report that the availability of atmospheric oxygen was very low or almost zero. In this era, photosynthesis was initiated and with it the production of oxygen as a waste substance of this process, however, being the levels probably at only 1% to 2% of its current level would not allow a human of this time to breathe.

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If a researcher only wanted to examine the relationship between exercise and grade point average,
kari74 [83]

The complete question is as follows:

If a researcher only wanted to examine the relationship between exercise and grade point average, _________ would be used to test the variables.

A.  correlation analysis

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Answer:

The correct answer would be - A. correlation analysis.

Explanation:

To find the relationship between two variables the correlation analysis is the statistical method is used. It is used to find the what and how the one variable is related to the other variable in this method.

It is used to evaluate the relationship between any two quantitative variables.To examine the relationship between exercise and grade point average,b this method would be best as it also shows how strong is the relationship of variables.

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3 years ago
HELP! This is the amount of oxygen present at a specific time that can be used in aerobic cellular respiration.
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Available oxygen

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3 0
3 years ago
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1. Describe DDT and summarize the history of the use and banning of DDT, including actions taken by the U.S. government. State t
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