HHH НОН
HH
Н
но-н
нНон
HHH
HHH
HHH
What best describes these three molecules?
They are not isomers.
They are structural isomers.
They are geometric isomers.
They are both structural and geometric isomers.

amber has allowed scientists to study dna that has been preserved over millions of years.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

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.