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
Afina-wow [57]
3 years ago
13

PLEASE HELP GIVING A TON OF POINTS!!!!

Biology
2 answers:
olya-2409 [2.1K]3 years ago
6 0
This guy is 100% correct thank you kind sir
algol133 years ago
4 0

I'm not sure on how to help with most of those, however I can try my best with a few parts.

The Hadean Eon

The first Eon of Time is the Hadean Eon. The Hadean Eon is the oldest interval of Time and is dated from 4,600 Million Years Ago to 3,900 Million Years Ago. No rock record dating from the Hadean Eon is known on Earth with the exception of the 3.96 Billion Year old rocks found in Canada's Northwest Territories. Although, rocks on other planets in the Solar System were possibly deposited during the Hadean Eon. Earth's earliest known life forms are found in rocks dating from the Archean Eon.

<em>Lasted around about 700 million years</em>

The Archean Eon

The oldest rocks known on Earth were deposited during the  Archean Eon which is dated from 3,900 Million Years Ago to 2,500 Million Years Ago. The Archean Eon is also referred to as the Archaeozoic Eon. Sedimentary rock deposited in the oceans during the Archean Eon contains microscopic life-forms that have bacterial characteristics. These organisms were  among the only living things on Earth for over one billion years. Stromatolites, formed by colonies of photosynthesizing bacteria known as cyanobacteria (blue-green algae) lived in shallow waters. In the Archean Eon, Earth's atmosphere was composed of methane, ammonia, hydrogen, and carbon monoxide, which would be unbreathable by living organisms today. The extensive colonies of photosynthesizing cyanobacteria released oxygen into the atmosphere, beginning a process that eventually resulted in a breathable atmosphere and impacted living things in future Eons.  The climate and weather in the Archean Eon were very hot and wet. The oceans were also very warm. Extensive worldwide volcanic eruptions ejected volcanic ash and dust into the atmosphere causing violent lightning storms and continual rain.

<em>Lasted around 1.5 billion years (I'm unsure about this one)</em>

The Proterozoic Eon

Rocks deposited during the Proterozoic Eon include evidence of multicelled organisms. The Proterozoic Eon was from 2,500 Million Years Ago to 540 Million Years Ago. The stromatolites remained common in the shallow waters of the Proterozoic Eon oceans, however, many other living things were present such as archaea that lived in extreme habitats where the water was very hot and extremely salty.  By the end of the Proterozoic Eon, eukaryotes, cells that have a nucleus, appeared and were the ancestors of all modern living things. One of the first extinctions occurred in the Proterozoic Eon when oxygen accumulated in the atmosphere and caused those bacteria that required the atmospheric conditions of the Archean Eon to die. The Proterozoic Eon also experienced two ice ages, when polar ice became at least a kilometer deep and covered an area extending to the equator.

<em>Lasted around 1.9 billion years</em>

The Phanerozoic Eon

The Phanerozoic Eon began 540 Million Years Ago and continues into the Present. The Rocks deposited during the Phanerozoic Eon contain evidence of fossilized hard body parts of modern living things.

<em>Still ongoing</em>

You might be interested in
during the lesson you analyzed the DNA sequence of the housefly. For which of the following porganis would you expect the DNA se
yan [13]
(1 pt) monkey I hope that helps
6 0
4 years ago
Read 2 more answers
swollen lymph nodes can be an indication of a: too much fluid in the body b: too little fluid in the body c: an infection d: no
RSB [31]

Answer:

C

Explanation:

Swollen lymph nodes usually indicate a common infection, but they can also signal a medical condition, such as an immune disorder or, rarely, a type of cancer. Lymph nodes are small, round structures that play a vital role in the body's immune system.

3 0
3 years ago
Can anyone answer this question for me?
mestny [16]

Answer:

0.5 or 50% = 2/4 First box on the bottom

5 0
3 years ago
The Case of the Missing Mass: Students have completed the experiment of combining vinegar and baking soda. They notice that thei
enot [183]
The law of conservation of mass states that atoms cannot be created not destroyed, so they could not have destroyed it. This means that the experiment had to be open (which means there is no barrier that keeps all the solution in, like a plug or a bag). When the liquid in the equation turned into gas, the gas floated away from the solution, making the ending mass smaller than the beginning.
8 0
3 years ago
Read 2 more answers
A scientist observes a pair of separate chromosomes that have genes for the same trait arranged in the same order. However, some
andre [41]

The correct answer is A. Homologous chromosomes with heterozygous alleles.

If the alleles of genes are different then the scientist is observing for homologous chromosomes with heterozygous alleles.

In each homologous pair there is one chromosome which comes from maternal chromosome and the other one from paternal chromosome.

Homologous chromosomes are not identical but they are similar. Alleles for each homologous chromosome is not same but genes are the same.

5 0
3 years ago
Read 2 more answers
Other questions:
  • 1. What is the difference between external and internal fertilization? *
    11·1 answer
  • Some single-called organisms make copies of themselves through mitosis. Which describes the function of the cell cycle in such s
    14·1 answer
  • 2 examples of density. plz
    7·2 answers
  • If the concentration of dissolved oxygen decreased what might happen to the entire aquatic ecosystem
    13·1 answer
  • which organisms are in the trophic level that receives the larger percentage of enery captured by the producers?
    12·1 answer
  • Which level of biological organization consists of all of the living and non livingthings in a particular area?
    7·1 answer
  • What is the relationship between biotic and abiotic factors?
    14·1 answer
  • Austin and Marissa hypothesize that coneflower stomata use feedback loops to respond to moisture levels by opening when there is
    11·1 answer
  • When can plastics become garbage
    13·1 answer
  • Question 2 of 5
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!