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,CHAPTER 1 YT




TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false.
YT YT YT YT YT YT YT YT YT YT YT YT YT YT YT


1) Members of the same species share many more characteristics compared to those s
YT YT YT YT YT YT YT YT YT YT YT YT



hared by members of the same kingdom.
YT YT YT YT YT YT



⊚ true
⊚ false


2) Viruses are YT YTYT not classified in any of Whittaker's five kingdoms.
YT YT YT YT YT YT YT




⊚ true
⊚ false


3) Members of the kingdom Fungi are photosynthetic.
YT YT YT YT YT YT




⊚ true
⊚ false


4) A scientist studying helminths is working with bacteria.
YT YT YT YT YT YT YT




⊚ true
⊚ false


5) The fossil record has established that prokaryotes existed on Earth for approximatel
YT YT YT YT YT YT YT YT YT YT YT



y two billion years before eukaryotes evolved.
YT YT YT YT YT YT




⊚ true
⊚ false


6) It has been over 25 years since a new infectious disease has emerged in the world.
YT YT YT YT YT YT YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


7) The term sterile means free of all life-forms.
YT YT YT YT YT YT YT




Version 1 YT 1

, ⊚ true
⊚ false


8) All microorganisms are parasites.
YT YT YT




⊚ true
⊚ false


9) During a scientific experiment, the control group is used to directly test or measu
YT YT YT YT YT YT YT YT YT YT YT YT YT



re the consequences of a variable in the study.
YT YT YT YT YT YT YT YT




⊚ true
⊚ false


10) The scientific method involves formulating a tentative explanation, called the hypoth
YT YT YT YT YT YT YT YT YT YT



esis, to account for what has been observed or measured.
YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


11) Once an organism is assigned to a particular taxonomic hierarchy, it is permane
YT YT YT YT YT YT YT YT YT YT YT YT



nt and cannot be revised.
YT YT YT YT




⊚ true
⊚ false


12) When the results of an experiment support a hypothesis, the hypothesis can n
YT YT YT YT YT YT YT YT YT YT YT YT


ow be considered a theory.
YT YT YT YT




⊚ true
⊚ false


13) The names of the three proposed domains are: Bacteria, Protista, Eukarya.
YT YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


Version 1 YT 2

, 14) One distinguishing characteristic of archaeais that they live in extreme environments.
YT YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


15) Some microorganisms can photosynthesize, but their overall contribution to Ea
YT YT YT YT YT YT YT YT YT



rth's atmospheric oxygen is very small in comparison to plant photosynthesis.
YT YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


16) Any microorganism on or in the human body is considered a pathogen.
YT YT YT YT YT YT YT YT YT YT YT




⊚ true
⊚ false


17) Theories are supported by more evidence than hypotheses.
YT YT YT YT YT YT YT




⊚ true
⊚ false


MULTIPLE CHOICE - YT YT



Choose the one alternative that best completes the statement or answers the question.
YT YT YT YT YT YT YT YT YT YT YT YT YT


18) Disease-causing microorganisms are called YT YT YT




A) decomposers.
B) prokaryotes.

C) pathogens.
D) eukaryotes.
E) fermenters.



19) The microorganisms that recycle nutrients by breaking down dead matter and waste
YT YT YT YT YT YT YT YT YT YT YT



s are called
YT YT




Version 1 YT 3