This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: In what types of environments might life have originated? What will be an ideal ... (Read 11 times)

HudsonKB16

  • Hero Member
  • *****
  • Posts: 535
on: Jul 14, 2018
In what types of environments might life have originated?
 
  What will be an ideal response?

Question 2

How is the Universal Tree of Life constructed?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Li Jun

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 14, 2018
Answer to Question 1

Life could have originated on mineral surfaces near hydrothermal vents, where lots of prebiotic chemistry could have taken place. Alternatively, life could have originated on the surface as a result of a process similar to that occurring in the Urey-Miller experiment. The organic compounds from which life formed could have been produced within the atmosphere from UV irradiation or in lightning discharges. Alternatively, some complex prebiotic compounds may have been synthesized in interstellar dust clouds and brought to the Earth by interplanetary dust particles or by meteorites.

Answer to Question 2

Biologists use the polymerase chain reaction to determine the part of the DNA sequence used to encode ribosomal RNA (rRNA). With this information, they can determine the differences in the rRNA of varying organisms. The greater the difference between two organisms' rRNA sequence, the farther apart they are placed on the tree. After a number of genetically diverse organisms are analyzed in this way, the Universal Tree of Life can be created.


HudsonKB16

  • Member
  • Posts: 535
Reply 2 on: Jul 14, 2018
Excellent

peter

  • Member
  • Posts: 330
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

The life cycle of HIV The life cycle of HIV
Brain types Brain types
Types of Health Maintenance Organizations Types of Health Maintenance Organizations
Conduction Velocities in Axons of Various Nerve Fiber Types Conduction Velocities in Axons of Various Nerve Fiber Types
Age-standardized disability-adjusted life year (DALY) rates from hepatitis B by country (per 100 000 ... Age-standardized disability-adjusted life year (DALY) rates from hepatitis B by country (per 100 000 ...
How to solve a half life problem involving exponential models (Question 1) How to solve a half life problem involving exponential models (Question 1)
Video: EpiPen Animation (Part 2)

For a complete list of videos, visit our video library