Frogs "croak" at night to allure females for mating. Females are attracted only to the song of their species. This is an example of
A. mechanical isolation.
B. temporal isolation.
C. habitat isolation.
D. behavioral isolation.
E. gametic isolation.
D. behavioral isolation.
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Enterotoxins are ________.
A. proteins B. exotoxins C. toxins that target the intestines D. virulence factors E. All of the choices are correct.
The goal of medical asepsis is to kill ____________________, whereas the goal of surgical asepsis is to kill ____________________.
A) all microorganisms ...pathogens B) bacteria...bacteria and viruses C) nonpathogens...pathogens D) pathogens...all microorganisms
Viruses travel through animals mainly by lysing cells and then spreading to other cells. Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a hypersensitive response, what is the most likely way the virus would spread to other plant cells?
A. Through the chloroplasts. B. Directly through the cell wall. C. Through the central vacuole. D. Through the plasmodesmata. E. Through transport vesicles. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about how plant viruses spread between cells? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Skeletal muscle contractions play a role in returning the venous blood to the heart.
Answer the following statement true (T) or false (F)