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
Natasha2012 [34]
3 years ago
13

Suppose a segment of mitochondrial DNA (mtDNA) is compared between two similar modern-day species. It is known that this segment

of mtDNA changes at a steady rate of one base pair every 4 million years. Compare the sequences of the two mtDNA segments given below. Species A: GCACTAAGCATCGATTT Species B: GCACCAGGCACTGGTTC Use the basic principle of molecular clocks to calculate how long ago the two species diverged from a common ancestor.
Biology
1 answer:
QveST [7]3 years ago
7 0

Answer:

24 million years

Explanation:

A: GCACTAAGCATCGATTT

B: GCACCAGGCACTGGTTC

There are 6 base pair changes between species A and species B. Since we know the rate of change is 1 base pair every 4 million years, we know 6x 4 million is likely how long ago the species diverged. 6x 4 million = 24 million years

You might be interested in
Which statement about heat and thermal energy is true? A. Scientists use both terms to describe how hot or cold something is. B.
zysi [14]

Answer:

D

Explanation:

Thermal energy is the energy that is generated and measured by heat.

5 0
3 years ago
Unlike in prokaryotic cells, replication in eukaryotic cells...
Kitty [74]
The answer is B) can start in many different places in a sequence at the same time.
These different places are called Origin of replication. :)))
i hope this is helpful
have a nice day  
4 0
3 years ago
Identify the major chromosomal abnormalities and their causes (eg. down's syndrome, turner's syndrome, klinefelter's syndrome, c
My name is Ann [436]
Chromosome defect lot of became syndrome.
it's lot of cause
8 0
3 years ago
In simple staining with a basic dye, do the gram-positive and gram-negative bacteria differ in retaining color?
Dmitriy789 [7]

Answer:

The above shows the procedures of the Gram's staining method, The result and important of colour in differentiating the bacteria. A little insight into staining endospore.

Explanation:

Stainings is a reagent or dye used to stain microscope specimens so as to make some structures visible.

Peptidogycan is a derivative polymer of glycan and peptides found in bacterial cell walls and varies in compositional concentration from species to species.

Cell wall- A thick, fairly rigid, layer formed around individual cells of bacteria, Archaea, fungi, plants, and algae (but not animals and other protists which generally have cell membranes without cell walls). The cell wall is external to the cell membrane and serves a structural function helping the cell maintain its shape and protecting the cell from damage.

There different types of staining techniques and classification based on the aim of the experiment and here is a few;

The etymology is from Gram + positive, is named after Dan ish bacteriologist Hans Christian Gram, who invented the Gram staining technique.

Used in bacteriology , bacteria that stains dark blue or violet after Gram staining, due to large quantities of peptidoglycan in the cell wall are gram positive.

And gram-negative bacteria is one that is not stained violet by Gram's method.

A spore is thick resistant particle produced by a bacterium or protist to survive in harsh or unfavorable conditions.

Spore staining (malachite green) however can be used to differentiate sporulating bacteria species.

The above shows the procedures of the Gram's staining method, The result and important of colour in differentiating the bacteria. A little insight into staining endospore.

8 0
2 years ago
Which of the following is not a concern with mining?
Rama09 [41]

Answer:d

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which structure would a unicellular organisms most likely have to move around?
    7·1 answer
  • Living thing composed of more than one cell
    10·2 answers
  • Match each neural component with its role in synaptic transmission. Drag each item on the left to its matching item on the right
    12·1 answer
  • Which layer of Earth's atmosphere contains the ozone layer, an important layer that helps protect life on Earth from UV radiatio
    12·1 answer
  • Mitosis results in ________ chromosome number, whereas meiosis results in ________ chromosome number.
    11·1 answer
  • These moth wings shown in the image below are all the same species.
    13·2 answers
  • What happens to the speed of molecules in water vapor when it condenses to form liquid
    12·1 answer
  • Thus is the question I'm NOT Sure of the awnser any help?
    13·2 answers
  • Instead of thymine, RNA Polymerase pairs the nucleotide base __________ with adenine.
    7·1 answer
  • If someone adds thousands of small fish to a lake, how would the number of big fish<br> change?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!