Marcus is studying plant growth. He uses four identical trays of potting soil. He plants 2 marigolds in the first tray, 5 in the second tray, 8 in the third tray, and 15 in the last tray.
Marcus places each of the trays on the same table near a window. Each day he adds an
equal amount of water to the soil in each tray. Once a week for the next month, Marcus
measures the heights of the plants in each tray.

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

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.

ice cream

explanation: