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
nadezda [96]
2 years ago
8

The molecular clock theory uses genetic traits to estimate how long ago various groups of organisms diverged evolutionary from o

ne another. Which of the following statements explains why this is considered to be a theory?
A) Many scientific investigations have provided evidence to support this as the best explanation of the data.

B) This is an opinion held by a group of scientists that cannot be proven or dis proven.

C) Because many scientists interpret the same data differently, it cannot be considered anything more than a theory.

D) This is an educated guess made by a scientist who published his findings for others to read.
Chemistry
2 answers:
Nataliya [291]2 years ago
8 0
<span>Many scientific investigations have provided evidence to support this as the best explanation of the data</span>
denpristay [2]2 years ago
4 0
<h3><u>Answer;</u></h3>

A) Many scientific investigations have provided evidence to support this as the best explanation of the data.

<h3><u>Explanation</u>;</h3>
  • <em><u>Molecular clock is a method that is used to determine time, based on base-pair substitutions. Molecular clocks use the rates of molecular change to deduce the divergence time between two lineages in a phylogeny.</u></em>
  • They work best when they can be "calibrated" with other markers of time, such as fossils with known ages.
  • Molecular clocks use neutral theory to date events within a phylogeny and can be affected by the segments of DNA being examined and relative sizes of the populations.
You might be interested in
Type the correct answer in the box.
IgorLugansk [536]

Answer:

a= <em>In scientific notation</em>

6.96000×10⁵ Km

b =<em>In  expanded notation</em>

0.00019 mm

Explanation:

Given data:

Radius of sun = 696000 Km

size of bacterial cell = 1.9 ×10⁻⁴ mm

Radius of sun in scientific notation = ?

Size of bacterial cell in expanded notation = ?

Solution:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

. The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³

Radius of sun:

696000 Km

<em>In scientific notation</em>

6.96000 × 10⁵ Km

The expanded notation is standard notation of writing the numerical values which is normal way. The numbers are written as they are, without the power of 10.

Size of bacterial cell:

1.9 ×10⁻⁴ mm

<em>In  expanded notation</em>

1.9/ 10000 = 0.00019 mm

3 0
3 years ago
How do you find the highest energy level?
joja [24]

Answer:

The larger the number of the energy level, the farther it is from the nucleus. Electrons that are in the highest energy level are called valence electrons. Within each energy level is a volume of space where specific electrons are likely to be located.

4 0
2 years ago
At 73.0 ∘c , what is the maximum value of the reaction quotient, q, needed to produce a non-negative e value for the reaction so
damaskus [11]
Here we will use the general formula of Nernst equation:

Ecell = E°Cell - [(RT/nF)] *㏑Q

when E cell is cell potential at non - standard state conditions

E°Cell is standard state cell potential = - 0.87 V

and R is a constant = 8.314 J/mol K

and T is the temperature in Kelvin = 73 + 273 = 346 K

and F is Faraday's constant = 96485 C/mole

and n is the number of moles of electron transferred in the reaction=2  

and Q is the reaction quotient for the reaction 
SO42-2(aq) + 4H+(aq) +2Br-(aq) ↔  Br2(aq) + SO2(g) +2H2O(l)

so by substitution :

0 = -0.87 - [(8.314*346K)/(2* 96485)*㏑Q      → solve for Q 


∴ Q = 4.5 x 10^-26 
6 0
2 years ago
Need water cycle project ideas. I need to make a video about the water cycle for my teacher but i dont have any ideas.And, i do
lara [203]
Take a zip lock bag and draw clouds on the outside with a sharpie then fill the bag with water and then tape it on a window that has a lot of sun and wait awhile and there should be a change in the water and that shooed what happens to water when it’s warm/sunny out
6 0
3 years ago
Read 2 more answers
Chemicals (and humans) are all about what
DerKrebs [107]

Answer:

Atoms, and chemical make up

Explanation:

Our bodies and any other terrestrial body are formed with atoms, those same atoms from a chemical make-up that creates items, such as water with 2 hydrogen atoms and 1 oxygen atom is formed. In essence, we all are about atoms and chemical makeup is the instruction on how to build us

4 0
3 years ago
Read 2 more answers
Other questions:
  • Murcury is the only metal at room temperature. Its density is 13.6g/mL. How many grams of murcury will occupy a volume of 95.8mL
    6·1 answer
  • Identify the mixture of gasoline and motor oil and suggest a technique for separating their components. 1. homogeneous; decantin
    14·2 answers
  • 1. Which processes are taking place in the system represented by the following equation?
    14·1 answer
  • Correctly identify the generic formula for a double replacement reaction.
    5·1 answer
  • Which natural polymer makes up paper? A. starch B. nylon C. wool D. rubber
    9·1 answer
  • Which landform is created by moving water?
    9·1 answer
  • C. A paramecium is a single-celled organism that lives in ponds. It travels at a rate of 2,000 micrometers per second. What is t
    5·1 answer
  • When a group 7 element reacts with a group 1 element, what is the effect on the group 1 atom
    13·1 answer
  • Air trapped in a cylinder fitted with a piston occupies 145.7 mL at 1.08 atm pressure.
    12·1 answer
  • Calculate the molarity of the two solutions.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!