In a lab, a group of students measured the temperature at which various substances boiled. Their results are listed in the table. Accepted Value (°C) Measurement in Lab (°C)
seawater 100.7 101.8
mercury 359.6 370.0
jet fuel 163.0 165.9
ethanol (alcohol) 78.4 81.8
Which measurement has the highest percent error?

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

a symbiotic relationship with the mitochondria

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.