11 - 20 of 41 Answers
December 13, 2011:
Since a leech, a vampire bat, and, a mosquito all consume blood from mammals, is it accurate to say that some part of each of these animals DNA is exactly alike? And further that all other creatures that do not consume blood do not have this same genetic trait in their DNA?
April 14, 2011:
Looking over human genomes and genomes of certain animals, I found on the Human Genome Project's website, I have found that the genomes of certain animals are nearly identical. Is it because of similar heritage, or is it because similar genes are used by nearly all species?
February 8, 2011:
How come plants can make essential amino acids but people can't? After all, both need the same amino acids to survive.
February 3, 2011:
I was researching about the similarity in human and chimpanzee and found out that we are not as similar as originally thought...If so, what is man's closest species relative and why do we still differ so much?
December 15, 2010:
I was just watching a program about evolution and was thinking about the many arguments that question the amount of time it would take single-cell organisms to evolve into us. My question is, considering that our brains can signal our bodies to react to infections, conditions, etc., is there any chance that our brains could likewise send a signal programming which genetic traits we'd like to pass on to the next generation?
July 29, 2010:
Is it possible to reconstruct dinosaurs from the DNA samples in amber and bird DNA?
May 6, 2010:
Where do new genes come from?
January 13, 2010:
Is it true that in earlier times humans were all O blood type (in ABO blood group) and that A, B and AB blood type occurred later by mutation of the O blood type gene?
December 11, 2008: I've read that humans gained about 200cc of brain capacity some 100,000 years ago. Is this true? Also, how did human brains get to be so big?
October 23, 2008:
Hypothetically, if all the dogs in the world could somehow run wild, how many generations would it take before they all looked the same?