In pea plants, the allele for purple flowers (P) is dominant and the allele for white flowers (p) is recessive. The allele for yellow seeds (Y) is dominant and the allele for green seeds (y) is recessive. The allele for round seeds (R) is dominant and the allele for wrinkled seeds (r) is recessive. These alleles segregate independently of each other. A plant with a PpYyRr genotype is crossed with a plant with a PpyyRr genotype. What is the probability that an offspring from this cross has at least two different recessive traits

thinking it would be physical characteristics

the fossil record provides evidence of a common ancestor to many species.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.