Question 1

Which of the following is NOT a key characteristic of metazoans (animals)?

Accepted Answer

They have cell walls

Question 2

Which protein is the most abundant in animal bodies and provides extracellular structural support?

Accepted Answer

Collagen

Question 3

Which of the following statements about animal development is TRUE?

Accepted Answer

Animals ingest food and then digest it internally

Question 4

Which of the following body plans is associated with bilateral symmetry?

Accepted Answer

Flatworms

Question 5

Which feature is used to categorize animals in phylogenetic trees?

Accepted Answer

All of the above

Question 6

Which group of animals lacks true tissues?

Accepted Answer

Sponges

Question 7

Which of the following is a characteristic of Porifera (sponges)?

Accepted Answer

Adults are sessile

Question 8

Cnidarians are unique among animals because they:

Accepted Answer

Have two germ layers and only one digestive opening

Question 9

Which of the following is NOT a function of cnidocyte cells in cnidarians?

Accepted Answer

Photosynthesis

Question 10

Which of the following statements about the evolutionary tree of animals is correct?

Accepted Answer

The tree shows only about one-third of all known phyla

Question 11

Which of the following is a defining feature of the Ctenophores?

Accepted Answer

Presence of a rudimentary nervous system

Question 12

Which of the following is TRUE about flatworms?

Accepted Answer

They are among the first animals with bilateral symmetry

Question 13

Which of the following is a reason why planarians are important in regenerative medicine research?

Accepted Answer

They have extraordinary regenerative ability

Question 14

Which of the following is a characteristic of annelids?

Accepted Answer

Segmented body plan

Question 15

Which of the following statements about molluscs is correct?

Accepted Answer

They have a complete nervous system

Question 16

Which of the following is NOT a feature used to categorize animals in phylogenetic trees?

Accepted Answer

Type of circulatory system

Question 17

Which of the following best describes the body plan of sponges?

Accepted Answer

Asymmetric

Question 18

Which of the following is TRUE about the nervous system in sponges?

Accepted Answer

They have no nervous system, but individual cells contain some nerve cell machinery

Question 19

Which of the following is a correct statement about the digestive system of cnidarians?

Accepted Answer

They have only one digestive opening

Question 20

Which of the following is a reason why the term 'invertebrate' is sometimes avoided by scientists?

Accepted Answer

It refers to a paraphyletic group

Animal Diversity: Introduction and Survey of Invertebrates

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