When researchers use a molecular clock what are they measuring?

In how many ways can 5 different trees be planted in a circle?

Based on your results which of the solutions that you tested with Benedict's solution contained reducing sugars?

Some antibiotics administered to humans inhibit peptide formation in microbes. how were the antibiotics made to target the microbes and not the eukaryotic host?

Access to water is critical to survival in plants. Since competition reduces fitness, natural selection tends to favor species that partition available resources.

An object is at rest. At five seconds, someone comes over and pushes the object forward with a force of 10 N. Which of the following choices describes the force needed to keep the object in static equilibrium?

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?

How would the lack of water affect cellular respiration?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.