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
AlekseyPX
3 years ago
9

Early cells likely formed from a group of organic compounds, including proteins, and primitive fatty acids. Why do most scientis

ts think that the first true cells formed on Earth were anaerobic? A.because they could produce their own oxygen
B.because there was no oxygen on early Earth
C.because they make their own food
D.because they use less energy to find nutrients
Biology
1 answer:
nordsb [41]3 years ago
4 0
The reason why nost scientists thought  that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
You might be interested in
For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to
posledela

Answer:

The correct answer will be option-E

Explanation:

Hershey and Chase's experiment was performed to test whether DNA serves as the genetic material or protein.

To perform experiment they grew bacteriophage into radiolabeled phosphorus and sulfur compounds. The phosphorus is an integral part of the structure of DNA whereas proteins contain sulfur in their structure.  

In the given condition if radiolabeled nitrogen is utilized then the experiment will fail as the structure of proteins also contains an amino group( NH₂) in their structure as well as DNA. The scientist will not be able to identify whether the DNA is the genetic material or protein.

Thus, option-E is the correct answer.

7 0
3 years ago
Humans conduct _____.
IrinaK [193]

Hello

Humans conduct internal fertilisation.

Thanks

5 0
3 years ago
Which of the following statements is FALSE regarding tRNA?
GuDViN [60]
It’s C. Amino acids bind to CCA3’OH end of tRNA via ester bond.
4 0
3 years ago
How does isolation of a population lead to a decrease in genetic diversity
exis [7]

Answer:

Decrease in genetic diversity reduces the chance of variation in the offspring.

Explanation:

If there is no variation, there will be no evolution. So, if there is a change in the environment (like an outbreak of a disease) that affects one of the organisms, it is likely to affect all of them and destroy the whole population. This would lead to extinction.

8 0
3 years ago
Which of the following is associated with plates sliding past each other?
Alla [95]
Earthquakes can be recognized through association of plates sliding past each other.
4 0
3 years ago
Other questions:
  • HELP ASAP!!!!
    8·1 answer
  • I’m pretty sure there is 3. Can someone help me?
    9·1 answer
  • Requires energy input by the cell
    5·1 answer
  • 2. Which is NOT a cause of physical weathering?
    7·1 answer
  • Please help ASAP ❤️❤️
    14·1 answer
  • When studying the immune system in class, Peta concluded that T-cells are more specific to the pathogen than inflammation is. Wh
    5·2 answers
  • Which is one event that may lead to Primary succession? clear-cutting climate change volcanic eruption introduced species
    15·2 answers
  • Colorblindness is caused by a recessive x-linked gene. a woman that is heterozygous for this trait marries a man with normal col
    6·1 answer
  • Im studying for a quiz and Im stuck on this question. Can someone tell me which phase ia anaphase, prophase, and telophase? And
    7·1 answer
  • It is difficult for blood to clot in wound artery than in wounded vein
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!