Biology 27 Animal Diversity MCQ


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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Unit 5. Biological Diversity

Chapter 27: Introduction to Animal Diversity MCQ Multiple Choices Questions Quiz Test Bank

27.1 Features of the Animal Kingdom

27.2 Features Used to Classify Animals

27.3 Animal Phylogeny

27.4 The Evolutionary History of the Animal Kingdom

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Biology 27 Animal Diversity MCQ
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Sample Questions from the Biology 27 Animal Diversity MCQ Quiz

Question: Which of the following is not a feature common to most animals?


development into a fixed body plan

asexual reproduction

specialized tissues

heterotrophic nutrient sourcing

Question: Which of the following phenotypes would most likely be the result of a Hox gene mutation?


abnormal body length or height

two different eye colors

the contraction of a genetic illness

two fewer appendages than normal

Question: Which of the following is thought to be the most closely related to the common animal ancestor?


fungal cells

protist cells

plant cells

bacterial cells

Question: Which of the following organism is most likely to be a diploblast?


sea star




Question: During embryonic development, unique cell layers develop and distinguish during a stage called ________.


the blastula stage

the germ layer stage

the gastrula stage

the organogenesis stage

Question: An animal whose development is marked by radial cleavage and enterocoely is ________.


a deuterostome

an annelid or mollusk

either an acoelomate or eucoelomate

none of the above

Question: Which of the following is not possible?


radially symmetrical diploblast

diploblastic eucoelomate

protostomic coelomate

bilaterally symmetrical deuterostome

Question: Which of the following periods is the earliest during which animals may have appeared?


Ordovician period

Cambrian period

Ediacaran period

Cryogenian period

Question: As with the emergence of the Acoelomorpha phylum, it is common for ____ data to misplace animals in close relation to other species, whereas ____ data often reveals a different and more accurate evolutionary relationship.


molecular : morphological

molecular : fossil record

fossil record : morphological

morphological : molecular

Question: What type of data is primarily used to determine the existence and appearance of early animal species?


molecular data

fossil data

morphological data

embryological development data

Question: Consulting the modern phylogenetic tree of animals, which of the following would not constitute a clade?






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Rachel Woolard
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