1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vadim26 [7]
2 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]2 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]2 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.

You might be interested in
Which of the following increase genetic variation during meiosis or sexual reproduction?
Afina-wow [57]

Answer:

A) all are correct

4 0
3 years ago
Substance A is added to water. After it is added, hydrogen ions are produced and accumulate in the solution. Most of the hydroge
ASHA 777 [7]

Answer:

Substance B is a group of hydroxide ions.

Explanation:

7 0
1 year ago
Do only plant cells have mitochondria?
Oduvanchick [21]
Yes plant cells do have mitochondira

3 0
3 years ago
Read 2 more answers
What domain do prokaryotic organisms fall under
Law Incorporation [45]
Two domains Archaea and Bacteria
3 0
3 years ago
Please help! (50 points)
RoseWind [281]

Answer:

Tofu and soy oil come from soy bean plants that are grown on farms. Many farmers grow soy beans as cash crops that they can send to places such as tofu processing plants. Soybean plants are legumes. Legumes have bacteria on nodules which are on the roots of the plant. The bacteria on the nodules takes nitrogen from the air and fixes it into the soil, so that other plants that require nitrogen can use it as well.

This nitrogen cycle that was breifly discussed above is used in what farmers call a crop rotation. Farmers use soybeans and other legumes in roatations with grass crops such as corn or wheat. Grass crops are unable to take their own nitrogen from the air so they either need the nitrogen in the soil that the legumes provide for them in a crop rotation or they need a chemical fertilizer containing nitrogen. Many farmers choose to use both. Most farmers use a two or four year rotation on their fields. In a two year rotation a farmer will alternate a year of a legume such as soybeans and a year of a grass crop such as corn. In a four year rotation a farmer will alternate back and forth between legumes and grass crops just as in a two year rotation, but instead he will use four differnt crops. For example, a farmer may plant a rotation of soybeans, corn, alfalfa (a legume), then wheat (a grass).

4 0
2 years ago
Other questions:
  • Which branch of earth science learns about the causes of landslides?
    7·1 answer
  • The neurotransmitter _____, which helps to control the preciseness of the signal sent from one neuron to another, decreases with
    6·2 answers
  • During embryonic development, the mesodermal tissue splits to form the coelom. Which type of invertebrate does this statement de
    5·1 answer
  • 1. Suppose a dominant allele (N) codes for a big nose and a recessive allele (n) codes for a small nose. Imagine that an organis
    15·1 answer
  • ________ infection is of greatest concern to pregnant women and those with a compromised immune system.
    7·1 answer
  • Glycogen synthase is an enzyme important for making glycogen. In response to glucagon, glycogen synthase is Glycogen synthase is
    13·1 answer
  • Which statement describes a catastrophe in The Tragedy of Julius Caesar?
    5·2 answers
  • Why are girls so complicated
    7·1 answer
  • Which of the following leads to evolution?
    14·1 answer
  • Question reply thank you
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!