In this animated activity, sexual reproduction in animals is contrasted with the alternation of generation lifecycle of plants.

Equilibrium plays a vital role in our lives. We'll show you how the equilibrium formula works in real life using our friend the chicken.

In this animated object, learners examine the major events that occur at the neuromuscular junction.

In this learning activity you'll analyze the basic steps in conjugation and applies the effect to microbial characteristics.

In this well-illustrated object, learners examine basic floral anatomy. The flower is the reproductive organ of the angiosperm.

Learners complete two exercises. In the first quiz, they divide viruses into two categories: RNA and DNA. They later match each virus with the disease it causes.

In this animated object, learners examine processes that do not use ATP directly including hydrostatic pressure and facilitated diffusion with carrier proteins.

In this interactive object, students view an animated depiction of Class 1 levers. A matching quiz completes the activity.

In this animated and interactive object, learners identify the valves and chambers of the heart.

Students solve a molarity problem in a drag and drop exercise.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

Learners study the effect that pressure has on boiling temperatures. Once a liquid has reached a full boil, additional heat does not raise the liquid’s temperature; however, pressure can vary the boiling point of a liquid. A brief quiz completes the activity.

In this screencast, learners examine the bones of the appendicular skeleton.

In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.

Students identify the various regions of the human body through video.

Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

In this interactive object, learners use the ideal gas law to solve a practice problem.

In this learning activity you'll review information on the neural synapse.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

Learners observe that the volume of one mole of any gas is 22.4 L at standard temperature and pressure. An illustration shows that only the mass of the molar volume differs with the identity of the gas.