Hello Pgoodrichstat!
The process that helps gas exchange occur is called diffusion.
Cheers!
-Blizzard
Genetic defects can be cause by any chromosome, whether an autosome or a sex chromosome.
The correct answer is d. 3.5 billion years.
Prokaryotes were the first forms of life on Earth long before simple multicellular life appeared because of their ability to withstand extreme conditions. It is believed that the first living forms were bacteria combined with archaea in the microbial mat (multi-layered sheet).
Well since the capital letter is dominate and always takes power and the lower case letter is recessive doesn't take power. It would be 50%.
The answer would be Yy and yy :D
