An animal that relies on a digestive tract for digestion breaks down food by

a) intracellular digestion only
b) both intracellular and extracellular digestion
c) extracellular digestion only
d) neither intracellular nor extracellular digestion


Ans: c) extracellular digestion only

Biology & Microbiology

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Indicate whether the statement is true or false

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Autoimmune diseases are disorders where the immune system fails to distinguish _______ from foreign ones.

What will be an ideal response?

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Normal bacterial inhabitants of the human body

a. are naturally resistant to antibiotics. b. are able to out-compete some invading pathogens and thus are one of the body’s initial defense mechanisms. c. can be transformed into pathogenic forms if a person’s resistance to disease is low. d. are unable to survive the human body’s defense mechanisms. e. are able to out-compete some invading pathogens and thus are part of the body’s innate immunity.

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The vaccine for which of these pathogens is an inactivated vaccine?

A) Hepatitis B) Human papillomavirus C) Influenza D) MMR E) Chicken pox

Biology & Microbiology