Question 1

Which of the following statements best explains why sponges (Phylum Porifera) are considered basal animals?

Accepted Answer

They lack true tissues and organs, and their lineage split early from other animals.

Question 2

A marine biologist discovers a new animal with the following characteristics: radial symmetry, diploblastic development, and a gastrovascular cavity with a single opening. To which phylum does this animal most likely belong?

Accepted Answer

Cnidaria

Question 3

Which structure in sponges is responsible for generating water flow and capturing food particles?

Accepted Answer

Choanocytes

Question 4

Tapeworms lack a digestive system. How do they obtain nutrients?

Accepted Answer

By absorbing nutrients directly through their body surface from the host's intestine

Question 5

Which of the following is a unique feature of the phylum Mollusca that distinguishes it from Annelida?

Accepted Answer

A mantle that secretes a shell

Question 6

A patient is diagnosed with trichinosis after eating undercooked pork. Which invertebrate phylum is responsible for this infection?

Accepted Answer

Nematoda

Question 7

Which of the following adaptations allowed arthropods to successfully colonize terrestrial environments?

Accepted Answer

Evolution of a rigid exoskeleton made of chitin

Question 8

Which group of invertebrates is characterized by a water vascular system used for locomotion and feeding?

Accepted Answer

Echinodermata

Question 9

A scientist observes an animal with a segmented body, jointed appendages, and an exoskeleton. Which phylum does this animal belong to?

Accepted Answer

Arthropoda

Question 10

Which of the following best describes the difference between incomplete and complete metamorphosis in insects?

Accepted Answer

In incomplete metamorphosis, nymphs resemble adults and gradually develop wings; in complete metamorphosis, larvae look different from adults and transformation occurs during the pupal stage.

Question 11

Which of the following is a function of the flame bulb system in flatworms (Platyhelminthes)?

Accepted Answer

Maintaining osmotic balance by excreting excess water

Question 12

Which of the following is a real-world consequence of the decline in freshwater bivalve populations?

Accepted Answer

Reduced water filtration and ecosystem health in rivers and lakes

Question 13

Which of the following equations best represents the relationship between surface area (SA) and volume (V) for a flatworm, and why is this relationship important?

Accepted Answer

$$SA \propto V$$, which maximizes diffusion for gas exchange and waste elimination in flatworms.

Question 14

Which of the following is a distinguishing feature of cephalopods compared to other molluscs?

Accepted Answer

A closed circulatory system and highly developed nervous system

Question 15

Which of the following best explains why arthropods are considered the most species-rich animal group?

Accepted Answer

They possess jointed appendages, a segmented body, and an exoskeleton, allowing for adaptive radiation into diverse habitats.

Question 16

Which of the following is a correct pairing of an invertebrate group and its feeding structure?

Accepted Answer

Molluscs – radula

Question 17

A researcher finds an animal with a dorsal nerve cord, pharyngeal slits, and a post-anal tail, but no backbone. To which group does this animal most likely belong?

Accepted Answer

Invertebrate chordates

Question 18

Which of the following is a real-world example of how changes in Hox gene regulation contributed to animal diversity?

Accepted Answer

The specialization of arthropod body segments for feeding, walking, or swimming

Question 19

Which of the following best describes the function of tube feet in echinoderms?

Accepted Answer

They function in locomotion, feeding, and attachment to substrates.

Question 20

Which of the following is a key developmental feature that distinguishes deuterostomes from protostomes?

Accepted Answer

The blastopore becomes the anus in deuterostomes.

An Introduction to Invertebrates (Campbell Biology, Ch. 33): Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드