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
tia_tia [17]
4 years ago
14

Based on fossil evidence, about how long ago did the first

Biology
2 answers:
bixtya [17]4 years ago
7 0

Answer:

The correct answer will be option-4.1 billion years ago.

Explanation:

Earth the only planet in the universe which harbors life was formed around 4.5 billion years ago.  

Organic molecules formed from the inorganic molecules started aggregating and formed the first single-celled organisms which were microscopic. The fossil evidence found in the deep rocks and hydrothermal vents in the ocean suggests that single-celled organisms were formed around 3.5-4.2 billion years ago.

Thus, option-4.1 billion years ago is the correct answer.

garik1379 [7]4 years ago
3 0
Around 4.1 billion years ago the first single celled organism appeared
You might be interested in
Chemical digestion involves condensation reactions.<br> O True<br> O False
kati45 [8]

False

Although I am answering based on my recollection, I am sorry if I am wrong.

4 0
3 years ago
What food contains no lipids, nucleic acids, carbonhydrates, or proteibs?
MrRissso [65]

Answer:

LEGUMES

Explanation:

5 0
3 years ago
Read 2 more answers
a black rooster Mated with a white hen. based on genotypes, the chance that the offspring will be checkered is 100 percent. what
gtnhenbr [62]

Answer:

The genotypes of the rooster and the chicken are homozygous and that of their offspring is heterozygous.

This case is called codominance, where the offspring receives an allele from each parent, from the rooster and the hen, because there is codominance, so neither allele is recessive and the phenotype of both alleles is expressed so the phenotype of the offspring is checkered.

We can say then that the chicken and the rooster have equal strength between their alleles. in the cases of codominance the laws of mendel do not apply.

5 0
4 years ago
Read 2 more answers
Plant Cell Writing Prompt
jeka94

Answer:

Plant cell

Explanation:

Cell wall: cell wall is only found in plant cell . it is made up of cellulose. it's function is to give shape to the cell and protect the delicate inner parts of the cell. this cell is fully permeable. it means it will allow all substance to pass in. cell membrane is made up of protein and lipids. it's function is to control what comes in and out of the cell. this membrane is selectively permeable. it means it allows some substance to pass in and others don't. cytoplasm is large sac like structure. most chemical process occur here. chromoplast are the green pigments.

cell wall is only found in plant cell . it is absent In animal cell . the neucleus in the plant cell contain a pigments haemoglobin, which contain genetic information to the cell .

3 0
3 years ago
Both the moon and the sun influence earth. the moon has a much greater influence though. why is that?
horrorfan [7]
I'm pretty sure its because the sun is farther away from earth so C
4 0
3 years ago
Other questions:
  • Knowledge of the driver mutations underlying cancer has led to targeted therapeutics, such as the protein kinase inhibitor imati
    12·1 answer
  • What kind of doctor is neil shubin
    10·2 answers
  • Identify three ways that teens who drink put themselves at risks for physical harm.
    5·1 answer
  • 2. You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth p
    11·1 answer
  • What should your next steps be as medical detectives in order to fill in the missing pieces of anna's medical history? refer to
    12·1 answer
  • Where are the photic, aphotic, littoral, limnetic, and benthic zones located at in a lake
    10·1 answer
  • How fast are plates moving apart mid ocean ridges
    14·1 answer
  • Why is freedom a concern for creationists?
    12·1 answer
  • Can someone fill this in for me (it doesn’t have to be accurate)
    13·1 answer
  • The structure that hotds two chromosomes together until they separate for cett divisionois
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!