Please help! Based on the graph explain whether spruce trees are an early, middle, or late successional species. Identify a species that would appear between 0 and 40 years on this graph.

the answers are a and c

its temperature is increasing. this causes molecular vibrations to increase.

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.