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
Ainat [17]
3 years ago
6

What is needed to estimate species relatedness with a molecular clock?

Biology
1 answer:
Dvinal [7]3 years ago
5 0


Out of the following given choices;

A. DNA accumulates mutations at a regular rate

B. known mutation rate for a gene

C. the number of differences in DNA sequences for a gene in two species

D. the same gene identified in two species

E. All answers are corrects

 

The answer is E. The molecular clock used rates of mutation to determine the prehistoric time when two species that share a common ancestor diverged. The benchmarks for determining the mutation rate are often fossil or archaeological dates.






You might be interested in
What is meant by the term epistasis? Distinguish between epistasis and dominance. Do not use examples in answering this question
Sunny_sXe [5.5K]

Answer:

Epistasis is a phenomenon in Genetics in which mutations on one gene locus are dependent on the mutations on some other genes locus. In other words, the expression of a phenotype of one gene is dependent on the presence or absence of mutations on other gene.

Dominance is phenomenon in genes in which a particular genotype masks the expression of alternative genotype and expresses itself due to complete takeover over other.

7 0
3 years ago
How could tides and ocean currents move plastics around the ocean?
Ulleksa [173]

The plastic trash gets transported all through the planet with the help of ocean currents. The term Great Pacific Garbage Patch was first named by Captain Charles Moore. He found that huge intact substances like cups, bottles, boxes, bags, and fishing nets, and other millions of smaller pieces of plastic over an estimated region covering about 650000 to 16000000 square kilometers.  

The garbage patches are witnessed in the oceans of the world wherever there is gyre. The gyres refer to the enormous circulating regions of water comprising the prime surface currents of the globe, mediated by the existing winds. The plastics would have got caught up in a gyre and would have been ended up in a region, known as the garbage patch.  

The currents present in the gyre take in the floating substance from around the periphery and trap it in the center. The currents and waves dissociate the plastic components into smaller pieces, however, it never goes away, and gets transported to different regions with the help of currents.  

The ocean currents mediate and transport useful things like organic nutrients, heat energy, and marine species from one location to another of the planet. However, at the same time, they can also transport other unnecessary floating things like plastic garbage.  

The plastic, mainly the larger pieces that float on the surface are transported at a faster rate than the water present beneath it, this is because the wind that moves the current also moves the plastic. In this sense, the plastic is flowing freely all over the ocean surfaces of the globe.  


6 0
2 years ago
Which process occurs only in autotrophic organisms? Calvin cycle chemiosmosis Krebs cycle proton pump mechanism
tankabanditka [31]
The answer to this question should be: Calvin cycle

Calvin cycle is a chemical reaction that was done in the chloroplast of a plant. This is one of the reactions in photosynthesis. In Calvin cycle, carbon dioxide and water will be used to make carbohydrates(glucose). This reaction is forming energy using the sunlight so only autotrophic organism capable that will be able to do it.

7 0
3 years ago
Proteins act as what in cells to control reactions
Damm [24]

The answer is; catalyst

These proteins are called enzymes. They work by lowering the activation energy of reactants and hence speed up the biochemical reaction. They are not affected in the process hence one enzyme molecule can catalyze many reactions. An example of such an enzyme is carbonic anhydrase that enables carbon dioxide to dissolve in blood plasma as carbonic acid.


5 0
3 years ago
A nucleotide consists of?
Setler79 [48]
A nucleotide consists of three things: A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil). A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons. One or more phosphate groups.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement is untrue regarding aerobic cellular respiration and lactic acid fermentation?
    9·1 answer
  • What are the tissue parts of a plant? And what types of cells are in each area?
    8·1 answer
  • Terri has been extremely sad, despondent, and guilt-ridden for over a year. in addition to this deep depression, she has also ha
    7·1 answer
  • What domain is kingdom protists in
    7·1 answer
  • Fluorescence microscopy allows investigators to view things _________ of regular light microscopes.
    11·1 answer
  • View the diagram below and answer the question.
    13·1 answer
  • What is photosynthesis<br><br>​
    7·2 answers
  • Please help this is late. I don’t understand it.
    7·1 answer
  • Chlorophyll is necessary for photosynthesis to take place because it-
    15·1 answer
  • GUYSSSSSSSSS ONLYYYYYYYYY HEHE LMA&gt;O
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!