Table of Contents

Viruses

Bacteria

Protists

Fungi

Viruses, Bacteria, Protists, and Fungi

Viruses

Virus ShapesThe leglike structures on the bottom of the T4 bacteriophage keep the virus firmly in place as it infects a cell.

Alive or Not?Which of these mystery objects is not alive?

Viruses

Viruses

Virus SizesThe Streptococcus bacterium is a round organism that causes strep throat. If it is 10 times larger than the cold virus, what is its size?

Viruses

Virus Structure and InvasionSome viruses are surrounded by an outer membrane envelope.

Vaccine ProtectionInfluenza (flu) and other diseases can be prevented by vaccines.

Viruses

Viruses can cause disease around the world.

Viruses

Bacteria

Bacterial Cell StructureA bacterial cell that lacks a flagellum can be carried from place to place by air, water, or other organisms. What are the missing names of the cell structures?

Complete the table that lists how the bacteria get energy, whether they need oxygen, and how to destroy them.

Bacteria

Asexual and Sexual Reproduction

Bacteria

Endospore FormationThe panels illustrate endospore formation.

Bacteria

Bacteria

Level of OxygenWhat might happen to the level of oxygen when a colony of autotrophic bacteria grows quickly under a sun lamp? When the size of the colony remains the same? When the bacteria get put into the shade?

Bacteria and the EnvironmentWhat are some roles of bacteria in nature?

Bacteria

AmoebaThis amoeba’s pseudopods surround and trap a food particle. What is the second step of this process?

Protists

Protists

Protozoans With FlagellaThe protozoan Giardia has eight flagella and two nuclei. How is the movement of oars on a boat similar to the movement of the flagella?

Protists

Protozoans With CiliaParamecia use cilia to move through water. How is the movement of oars on this boat similar to the movement of cilia?

AmoebasHow will the amoebas respond to bright light? Why is it important that they respond to light?

Protists

Functions of AlgaeAlgae play important roles in the environment. What are the functions of each type of algae?

Protists

Soybean Crop LossThe graph shows crop loss in metric tons in the United States between 2002 and 2005. How can the vertical axis be labeled? How did the soybean crop loss change? What would be a good title for the graph?

Protists

Structure of a MushroomWhat function might the underground hyphae in this mushroom perform?

Fungi

A dot of mold has started growing in the middle of each of two dishes containing the same bacteria. What happened by day two? Are the two dots of mold the same type of fungus?

Fungi

What in the World?Rico is taking a trip around the world. Follow him as he encounters viruses, bacteria, protists, and fungi in the environment.

Fungi