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
Dima020 [189]
3 years ago
14

Which of the following uses the relationship between the DNA of various groups of organisms to determine how long ago they diver

ged evolutionarily from one another?
Carbon dating
Fossils
Timelines
Molecular clocks
Chemistry
1 answer:
Triss [41]3 years ago
4 0
Molecular clocks because the m<span>easure changes in DNA or proteins to indicate degrees of relationship among species.Molecular clocks, together with evidence from the fossil record, allows scientists to estimate how long ago various groups of organisms diverged evolutionarily from one another</span>
You might be interested in
Which best describes how heat energy moves within the system?
Radda [10]

Heat can be transferred from one place to another by conduction in solids, convection of fluids like liquids or gases, and radiation. A temperature difference in a system causes heat to move from higher to lower temperatures

8 0
3 years ago
Read 2 more answers
How many moles of Al are needed to react completely with 1.2 moles of Fe0
DIA [1.3K]
0.8 moles

 3 moles of feO  gives you  2 moles of Al and 1.2 of your moles should give you 1.2 divided by 3*2 so it equals 0.80 moles 

Right?
7 0
3 years ago
Concerning Boyle's Law, if you had a gas at a pressure of 101 kPa and decreased the volume of the container holding the gas to o
Viefleur [7K]

Answer:

P_2=404 kPa

Explanation:

Hello,

In this case, the Boyle's is mathematically defined via:

P_1V_1=P_2V_2

Which stands for an inversely proportional relationship between volume and pressure, it means the higher the volume the lower the pressure and vice versa. In such a way, since the volume is decreased to one quarter, we can write:

V_2=\frac{1}{4} V_1

We can compute the new pressure:

P_2=\frac{P_1V_1}{V_2} =\frac{P_1V_1}{\frac{1}{4} V_1} =\frac{101kPa*V_1}{\frac{1}{4} V_1} \\\\P_2=4*101kPa\\\\\\P_2=404 kPa

Which means the pressure is increased by a factor of four.

Regards.

7 0
3 years ago
What causes objects to speed up, slow down, and change directions?
vlada-n [284]
The answer is force

sorry if i’m wrong
4 0
3 years ago
why is the concentration of helium increased in some gas mixtures that divers breath in order to reduce the partial pressure of
sdas [7]

Answer:

Because of oxygen toxicity.

Explanation:

Oxygen toxicity.

Oxygen has been known to cause central nervous system (CNS) toxicity when the pressure gets higher. This toxicity can cause convulsions, and this can cause the diver to drown.

The current standard maximum safe oxygen working pressure is 1.4 atm ppO2. This is equal to 56.5m/185′ when breathing air (21% O2 / 79% N). Below that depth the fraction of oxygen in a breathing gas must be reduced, and in order to maintain this maximum pressure of 1.4 ppO2, Helium must be added.

8 0
3 years ago
Other questions:
  • Write the concentration equilibrium constant expression for this reaction. cr2o−27 (aq) + 6i− (aq) + 14h+ (aq) → 3i2 (s) + 2cr+3
    14·1 answer
  • What is the chemical formula for iron (III) bicarbonate?
    12·1 answer
  • A student constructs an electrochemical cell. A diagram of the operating cell and the unbalanced ionic equation representing the
    12·1 answer
  • Is the following sentence true or false carbon atoms can only form a single bond between other carbon atomd?
    11·1 answer
  • A tank contains 50 kg of salt and 1000 L of water. Pure water enters a tank at the rate 6 L/min. The solution is mixed and drain
    5·1 answer
  • Where would you expect snow or rain to fall on a mountain?
    15·2 answers
  • Perform an on-line search to find real-world uses for the titration process. State what you find below.
    12·1 answer
  • I Need Help!!! 50 POINTS AND BRAINLIEST!!! Fill out the study guide ASAP!!!
    8·1 answer
  • A plastic bin is found to hold 3.1x10^24 molecules of water.
    5·1 answer
  • When hydrogen is fused into helium, energy is released from
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!