What type of succession do you think is displayed in the case of Mount Saint
Helens? Why?
O Primary succession because there is soil left
O Primary succession because the lava wiped away all the soil, leaving bare rock
Secondary succession because there was soil left after the eruption

primary succession because there is soil left

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

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.