True or false? Monozygotic (or identical) twins can have small genetic differences.

A certain atom of oxygen contains 8 protons, 8 neutrons, and 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom? A. It is an isotope of oxygen B.

Which of the following is an example of evolution? A. The beaks of penguins are used to catch fish. B. A baby penguin gradually growing larger and stronger. C. An adult penguin learning a new way to hunt, allowing it to catch more fish when hunting.

When a muscle cell demands energy to contract, what happens to ATP?

When an automotive battery is fully charged, the sulfuric acid and water mixture will have a specific gravity of about

Which of these is a product of anaerobic respiration? A. carbon monoxide B. water C. glucose D. lactic acid

The process by which natural forces move weathered rock and soil brim one place to another is called

Describe how testosterone production is associated with puberty in males.

Macromolecules that contain carbon, hydrogen and oxygen in a 1:2:1 ratio is called?

How might a dramatic decrease in vegeta-tion lead to a decrease in a prey species? (Hint: Think of how the vegetation, prey, and predator could be connected in a food chain.)

Which two body systems interact to expel the waste product carbon dioxide?