Ask Question, Ask an Expert


Ask Biology Expert

1. In the "DNA clock", some nucleotide changes cause amino acid substitutions in the encoded protein (nonsynonymous changes), and others do not (synonymous changes). In a comparison of rodent and human genes, rodents were found to accumulate synonymous changes 2.0 times faster than humans and nonsynonymous substitutions 1.3 times as fast. What factors could describe this difference? How do such data complicate the use of molecular clocks in absolute dating?

2. Imagine that Pangea were re-formed today. What might be some of the environmental effects, and how might these changes influence life on Earth?

Biology, Academics

  • Category:- Biology
  • Reference No.:- M927504

Have any Question? 

Related Questions in Biology

You have been asked to investigate a new procedure that

You have been asked to investigate a new procedure that physicians would like nurses to adopt in the hospital. Discuss the process you would apply to determine whether the procedure falls within the RN scope of practice ...

For each of the following questions assume only one cycle

For each of the following questions, assume only one cycle of the TCA is completed during the course of the experiment. a) Oxaloacetate labeled at C4 with the radioactive isotope 14C is added to a suspension of respiring ...

Physiology learning planfor your selected topic you are the

Physiology Learning Plan For your selected topic: You are the nephrology nursing educator working with new mill Topics -  GFR -  Removal of metabolic wastes -  Excretion of drugs and toxins -  Total body fluid volume and ...

What type of solution is 10 dextrose to the

What type of solution is 10% dextrose to the cell?  Assuming dextrose is a non penetrating solute, in which direction will net diffusion occur (into the cell; out of the cell; no movement?

Answer in a word or two1 name the type of reproduction in

Answer in a word or two: 1. Name the type of reproduction in which two parents are involved? 2. Name the fundamental methods of reproduction? 3. Name the kind of reproduction in which opposite sexes are not involved. 4. ...

For the optimal temperature experiment which

For the optimal temperature experiment, which enzyme/substrate pair did you use? List your results for the absorbance at one minute when the temperature was 10, 20, 30, 40, 50, 60, 70 and 80 degrees. Based on your result ...

What makes a dna fingerprint uniquei need to experiment and

What makes a DNA Fingerprint Unique? I need to experiment and create a lab report. Writing Lab Reports What lab reports and scientific papers do: - Persuade others to accept or reject hypotheses by presenting data and in ...

Presents a clear logical case in irac format for the issues

Presents a clear, logical case in IRAC format for the issues of informed consent in patients with dementia. Proposes logical resolutions for the issue, why it is an issue, how it could have occurred, and what safeguards ...

Microscope lab-in our world cells come in two basic

Microscope Lab- In our world Cells come in two basic types- Prokaryotic Cells - Bacterial & Archaea Eukaryotic Cells - Plant, Animal, Protist, and Fungi (Yeasts are single celled fungi) ...

Write the null and research hypotheses for the following

Write the null and research hypotheses for the following description of a research study: A group of middle-aged men was asked to complete a questionnaire on their attitudes toward work and family. Each of these men is m ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate