Which question is testable

Why is it likely scientists will never find a rock old enough to confirm the earths actual age

Which experiment should be conducted as a field investigation?

Which protein complex allows hydrogen ions to rush out of the thylakoid, providing energy that can be used to make a molecule? A. photosystem I B. photosystem II C. ATP synthase D. the hydrogen pump

Explain the physiological events that occurred during the simulated asthma attack. Hint: Think about what it felt like and how it would affect your generl state of well-being and activity level.

Explain four treatment options for hazardous waste.

What is one difference between a cell wall and a cell membrane? 1) Cell walls have gap junctions. Cell membranes have plasmodesmata. 2) Cell walls act as a boundary that nothing can pass through. Cell membranes allow materials in and out of the cell.

Plants have (blank) cells that contain the DNA that decides how they take shape and function Options Elongated Meristem Parenchyma

The number of phenotypes produced for a given trait depends on

In what ways are index fossils and layers of volcanic ash found in ice cores similar?

The percentage of silt in silty clay loam is what? a. 60% to 70% b. 80% to 90% c. 90% to 100% d. 10% to 20%