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
Yakvenalex [24]
3 years ago
7

There are three major, distinct groups of organisms: bacteria, archaea, and eukaryotes. However, until recently bacteria and arc

haea were considered much more closely related than we know they are today. What is one of the most important ways scientists determined the evolutionary distinctiveness of these three groups?
Biology
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

Comparative genomics of the three groups

Explanation:

The comparative genomics of the three groups was used to determine their evolutionary distinctiveness. Comparative genomics is a powerful tool used to study evolutionary changes among organisms, it helps to identify gene similarities and differences among organisms.  

Bacteria and archaea (formerly called archaebacteria)  were considered much more closely related, but DNA sequence analysis showed numerous differences between the two groups, and further proved that archaea was closely related to eukarya than bacteria.

However, in 1970, Dr. Carl Woese and other scientists in a bid to determine the distinction between the three groups made use of the nucletide sequence of the ribosomal RNA as an evolutionary time clock.

It is widely known that the rRNA sequences; is present in all organisms, functions differently in various organisms, is involved in protein synthesis, can be align between two organisms and can change gradually over a long period, hence this made it a good tool to determine evolutionary distinctiveness.

You might be interested in
Which of the following are items that are a threat to biodiversity?
Alchen [17]

Answer: poaching and habitat loss

Explanation: succession and extinction quiz

3 0
2 years ago
Read 2 more answers
What type of ions carry the impulse across the synapse from one neuron to the next ?
grandymaker [24]

It's the sodium ion.

When a neural impulse is fired in both neurons, it is always cause by an excited electron in one neuron moving to the other neuron to destabilize the balance of ions trying to keep them at equilibrium. This action either depolarizes or hyper-polarizes the membrane. If it does, then sodium ions--the key deficient ones--can flow into that region of low charge and maintain that state of low charge, keeping the cell membrane stable.

7 0
2 years ago
When utilizing a KO mouse model, you want to see if introducing the dystrophin gene can rescue the DMD mouse model. Propose a me
-BARSIC- [3]
<h2>CRISPR/Cas9</h2>

Explanation:

CRISPR can be used to reintroduce dystrophin back into the KO mouse

  • CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats and is used to for gene editing
  • CRISPR/Cas-mediated genome editing has been shown to permanently correct DMD mutations and restore dystrophin function in mouse models
  • Germline editing by injecting zygotes with CRISPR/Cas9 editing component was first done in mdx mice by correcting the mutated exon 23
  • Postnatal editing of mdx mice was then achieved using recombinant adeno-associated virus to deliver CRISPR/Cas9 genome editing components and correct the dystrophin gene by skipping or deleting the mutated exon 23 in vivo
  • Germline and postnatal CRISPR/Cas9 editing approaches both successfully restored dystrophin function in the mice and same technique can be used for KO mouse model
4 0
3 years ago
Which are characteristics of scientific questions? Check all that apply.
lisov135 [29]

Answer:

asking about subjective matters, addressing a gap in knowledge, and already having fully confirmed explanations

Explanation:

4 0
3 years ago
Which branch of the autonomic nervous system (ans) mobilizes the body during extreme situations, such as rage or fear?
Shalnov [3]
There are two branches of the autonomic nervous system, namely the sympathetic nervous system and the parasympathetic nervous systems. Both of which regulates bodily functions involuntarily but in different manners. The parasympathetic system is the system primarily activated in "relaxed" states or "rest and digest" states. These include digestion, urination, slowing of heart rate, slowing of respiratory rate, etc. The sympathetic nervous system on the other hand is primarily activated by "flight or flight" response such as rage or fear. These include inhibition of digestion, increase in heart rate and respiratory rate, sweating, etc.
7 0
3 years ago
Other questions:
  • Can a person who commits a tort be sent to jail as a result of his conduct?
    13·1 answer
  • Which tends to increase the size of a population?
    8·2 answers
  • What is the elemental composition of proteins?
    11·1 answer
  • This food web represents a community along the coast of Alaska
    6·2 answers
  • Thank you for helping if you do
    5·2 answers
  • Carbon Cycle, Water Cycle, or Both.
    9·1 answer
  • The diagram below represents part of a process that occurs in cells
    15·1 answer
  • Name of Tail-like organelle used by some protist
    13·1 answer
  • Meg ran 100 meters in 7.8 seconds. Linda ran 100 meters in 14.5 seconds. Which statement is correct?
    9·2 answers
  • What is one way RNA differs from DNA?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!