Which radiometric dating technique is applicable to Earth's oldest rocks?

uranium-lead

uranium-thorium

carbon-14

potassium-argon

How does the structure of an enzyme affect its function

What determines similarities in anatomical features among organisms

If salinity increased at the poles, the water near the poles would A. decrease in density, so it would sink more slowly B. Increase in density, so it would sink more rapidly C. decrease in density and become water vapor D.

Changes in pressure which can cause rocks to crack is an example of

Which topic could be investigated using the scientific method, with the investigation organized around a appropriate research question?

How do organisms with small genomes, such as escherichia coli, carry out so many different biochemical reactions?

Which of the following conditions is MOST commonly screened for in maternal blood tests? A. phenylketonuria and chromosome abnormalities B. Tay-Sachs disease and neural-tube defects C. cancer and multiple sclerosis D.

What could a dog living now and a car living thousnads if years ago have in common

The process of transducing air pressure waves into neural messages that the brain interprets as meaningful sound is known as

Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons. c. because water accepts electrons. d. because water acts as a catalyst.