Which of these animals is an insect?
Correct answer A. Moth
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Biology MCQs
Page 18 of Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 18 of 75
Which of these insects is not nocturnal?
Correct answer C. Butterfly
Which pigments give diatoms their golden-brown colour?
Correct answer B. Fucoxanthin, diatoxanthin, diadinoxanthin
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Which structure enables diatoms to move?
Correct answer C. Raphe
What is diatomaceous earth used to make?
Correct answer A. Fireproof bricks
What keeps diatoms afloat?
Correct answer B. Stored lipids
In which organisms are oil bodies found in the cells?
Correct answer C. Diatoms
What do the chloroplasts of diatoms and chrysophycean algae lack?
Correct answer B. Defined grana and stroma
What is the frustule, or shell, of a diatom made of?
Correct answer A. Silica
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What are the empty silica shells of diatoms called?
Correct answer B. Frustule
In which organisms is the cell wall extremely well preserved in fossils?
Correct answer B. Diatoms
Unlike other algae, why do diatoms not decay easily?
Correct answer A. Siliceous wall
In which organisms is the cell wall usually made of two overlapping halves called the epitheca and hypotheca?
Correct answer D. Diatoms
In which group is the cell wall heavily impregnated with silica?
Correct answer A. Bacillariophyta
Microfossils of which organisms are often found in petroleum-producing rock formations?
Correct answer B. Diatoms
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Which diatom is an example of the centric, disc-shaped form?
Correct answer B. Coscinodiscus
Where are diatoms found?
Correct answer D. All of the above
Which group of organisms consists entirely of diatoms?
Correct answer C. Pinnularia, Navicula, Cymbella, Melosira
To which group do diatoms belong?
Correct answer D. Both A and B
Which organisms are sometimes described as the “pastures of the sea”?
Correct answer C. Diatoms