Question 1

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

Accepted Answer

They lack true tissues and have a simple body plan with several cell types.

Question 2

Cnidarians are unique among eumetazoans because they:

Accepted Answer

Possess cnidocytes containing nematocysts for prey capture and defense.

Question 3

Which of the following is a key adaptation that allowed arthropods to colonize terrestrial environments?

Accepted Answer

Evolution of a rigid exoskeleton made of chitin that reduces water loss.

Question 4

A patient presents with muscle pain and swelling after eating undercooked pork. Which invertebrate phylum is most likely responsible for this infection?

Accepted Answer

Nematoda

Question 5

Which feature distinguishes molluscs from annelids?

Accepted Answer

A body plan with a muscular foot, visceral mass, and mantle.

Question 6

Which of the following best describes the function of the water vascular system in echinoderms?

Accepted Answer

It is used for locomotion, feeding, and gas exchange via tube feet.

Question 7

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

Accepted Answer

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

Question 8

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 9

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

$$SA \propto V$$^{1/2}$$; it enables efficient diffusion of gases and wastes across the body surface.

Question 10

Which of the following is a correct pairing of an invertebrate group and a unique feature?

Accepted Answer

Arthropoda – exoskeleton made of chitin

Question 11

A scientist discovers a new animal with the following characteristics: bilateral symmetry, a coelom, segmentation, and parapodia. To which phylum does this animal most likely belong?

Accepted Answer

Annelida

Question 12

Which of the following best explains why insects are the most diverse group of animals on Earth?

Accepted Answer

They possess wings, allowing them to exploit new habitats and resources.

Question 13

Which of the following is true about the development of deuterostomes?

Accepted Answer

The blastopore becomes the anus, and cleavage is radial.

Question 14

Which of the following is a real-life example of a parasitic flatworm with a complex life cycle involving multiple hosts?

Accepted Answer

Blood fluke (Schistosoma mansoni)

Question 15

Which of the following best describes the evolutionary significance of Hox genes in arthropods?

Accepted Answer

Changes in their sequence or regulation led to the diversification of body segments and appendages.

Question 16

Which of the following is NOT a function of the mantle in molluscs?

Accepted Answer

Forming the muscular foot for movement

Question 17

Which of the following best explains why earthworms are important for agriculture?

Accepted Answer

They aerate and till the soil, improving its texture and fertility.

Question 18

Which of the following is a correct description of 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 very different from adults and undergo a pupal stage.

Question 19

Which of the following is a unique feature of chelicerates among arthropods?

Accepted Answer

Claw-like feeding appendages called chelicerae.

Question 20

Which of the following best describes the feeding mechanism of bivalves?

Accepted Answer

They use gills for suspension feeding and gas exchange.

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

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드