If you found a human skeleton that you believe is approximately 20,000 years old, which radioisotope would you use to date it?

235U

238U

14C

40K

What is the difference between vascular and nonvascular plants? Circle the correct answer. A. presence of leaves B. need water in order to grow C. have systems for transporting water and minerals

Taphonomists would probably conclude that hominins had scavenged meat from an animal carcass they did not kill if fossil animal bones:

Ed Physics and Chemistry A (Edwards) Potential and Kinetic Energy Pre-Test Active 2 2 2 2 2 DOOD Which set of terms best defines what affects kinetic energy and potential energy, respectively?

Those parts of a new mRNA transcript that get spliced out and don't wind up getting translated into proteins are called: a. exons b. spliceosomes c. introns d. protons

What serves as the body's chief storage site for lipids?

Describe what is happening to the chromosomes during each sub-phase of Meiosis I and Meiosis II.

What accounts for genetic biodiversity existing in modern multicellular organisms?

Torri and Tamara are both performing scientific investigations on the learning capabilities of mice. In Torri's experiment, she sets up two knobs in a cage with a mouse. When the mouse touches the knob on the left, it receives a small shock.

What did Chargaff discover while studying bases in the DNA of organisms?

Russia's system of government and identify its basic structure.