2.- Señale la opción incorrecta: a) las bacterias pueden liberar sustancias llamadas toxinas que producen enfermedad b) parasito es todo ser vivo que vive a expensas de su huésped c) la inmunidad puede ser congénita o adquirida d) las vacunas y los sueros nos dan inmunidad, pero hay diferencias entre ellos e) la inmunidad adquirida es congénita

MODULE 23 Assessment Vocabulary Review Correct the sentences below by replacing the italicized term with the correct vocabulary term. 1. A(n) infection is an organism that causes disease. 2. A substance that kills cells or interferes with their functions is called a(n) vector. 3. When pathogens in the body multiply and damage body cells, a(n) virus results. Understanding Key Concepts After reading the question or statement, select the correct answer. 4. The common cold and influenza are caused by a. overeating. b. viruses. c. bacterial infection. d. exposure to toxins. 5. Malaria, West Nile virus, and Lyme disease are

8. Wolves are at the top of the wolves all but disappeared from Yellowstone. Which of the following was a likely effect of the wolves' disappearance?

7. The European rabbit (an herbivore) was introduced to Australia in the 1800 s. It has no natural predators in the continent and breeds very quickly. Which of the following is a negative impact that resulted from the introduction of rabbits to the Australlan ecosystem?

Which of the following happen when dehydration begins to occur? the body reduces fluid output to zero polyuria is present. the body increases the release of atrial natriuretic hormone the salivary secretions decrease

Quel mécanisme permet à un jeune pied de ronce de former rapidement un roncier (buisson de ronces)? Indiaue comment la ronce conguiert un autre milieu, même éloigné? Comment s'effectue