1. Why would skateboarding on grass be more difficult than skateboarding on concrete? Explain how high and low friction affects velocity.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

so whats the answer

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.