Question 1

Which of the following characteristics is unique to animals and helps distinguish them from other eukaryotic kingdoms?

Accepted Answer

Cells supported by structural proteins such as collagen, rather than cell walls

Question 2

A researcher discovers a new aquatic organism with the following features: a sac-like body with a single opening, radial symmetry, and stinging cells used for capturing prey. To which phylum does this organism most likely belong?

Accepted Answer

Cnidaria

Question 3

Which of the following best describes the difference between protostome and deuterostome development?

Accepted Answer

Protostomes exhibit spiral, determinate cleavage, while deuterostomes exhibit radial, indeterminate cleavage

Question 4

Which of the following is a function of a true coelom in animals?

Accepted Answer

It enables internal organs to grow and move independently of the outer body wall

Question 5

A patient is diagnosed with a tapeworm infection. Which of the following statements about the organism is correct?

Accepted Answer

It is an acoelomate belonging to the phylum Platyhelminthes

Question 6

Which of the following best explains why identical twins are possible in deuterostome animals but not in protostome animals?

Accepted Answer

Deuterostomes have indeterminate cleavage, so each early embryonic cell can develop into a complete organism

Question 7

Which of the following is NOT a function of the mammalian lymphatic system?

Accepted Answer

Transporting oxygen directly to tissues

Question 8

Which of the following best describes the main difference between open and closed circulatory systems?

Accepted Answer

In open systems, the circulatory fluid bathes organs directly, while in closed systems, blood is confined to vessels

Question 9

Which of the following is a correct sequence of events in the mammalian digestive process?

Accepted Answer

Ingestion → Digestion → Absorption → Elimination

Question 10

A marine biologist observes an animal with a segmented body, jointed appendages, and an exoskeleton made of chitin. Which phylum does this animal belong to?

Accepted Answer

Arthropoda

Question 11

Which of the following statements about the four main types of animal tissues is correct?

Accepted Answer

Muscle tissue is responsible for nearly all types of body movement

Question 12

Which of the following is a correct description of the function of pharyngeal slits in chordates?

Accepted Answer

They function in suspension feeding, gas exchange, or develop into parts of the ear, head, and neck in tetrapods

Question 13

Which of the following best explains why animals require essential nutrients in their diet?

Accepted Answer

Essential nutrients are materials that animals cannot synthesize from simpler organic molecules and must obtain from their diet

Question 14

Which of the following is a correct pairing of a connective tissue and its function?

Accepted Answer

Adipose tissue stores fat for insulation and fuel

Question 15

A patient is unable to maintain a stable internal temperature despite changes in the external environment. Which homeostatic mechanism is most likely impaired?

Accepted Answer

Thermoregulation

Question 16

Which of the following best describes the difference between the endocrine and nervous systems in animals?

Accepted Answer

The endocrine system releases hormones that act slowly but have long-lasting effects, while the nervous system transmits signals rapidly between specific locations

Question 17

Which of the following equations correctly represents the relationship between metabolic rate, oxygen consumption, and energy use in animals?

Accepted Answer

$	ext{Metabolic Rate} = \frac{	ext{Energy Used}}{	ext{Time}}$

Question 18

Which of the following is a correct example of heat exchange by convection?

Accepted Answer

A lizard warming up as air moves past its body on a windy day

Question 19

Which of the following best describes the primary immune response?

Accepted Answer

It is the first exposure to a specific antigen, resulting in the formation of a clone of lymphocytes

Animal Diversity, Structure, and Function: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards