Which type of protein is like brick that can be stacked up like columns having the nerve cell its shape?

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

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.