Question 1

Which of the following is a synapomorphy of adult echinoderms?

Accepted Answer

Pentaradial symmetry

Question 2

Which class of echinoderms is characterized by a feeding structure called Aristotle's Lantern?

Accepted Answer

Echinoidea

Question 3

A marine animal with jointed ossicles in its arms, a blind gut, and no ampullae most likely belongs to which class?

Accepted Answer

Ophiuroidea

Question 4

Which of the following is NOT a characteristic shared by all chordates at some stage of development?

Accepted Answer

Exoskeleton of calcium carbonate

Question 5

In the water vascular system of a sea star, what is the correct sequence of water flow?

Accepted Answer

Madreporite → stone canal → ring canal → radial canal → ampullae → tube feet

Question 6

Which echinoderm class is known for evisceration as an anti-predator behavior?

Accepted Answer

Holothuroidea

Question 7

Which of the following is a trait unique to deuterostomes?

Accepted Answer

Radial cleavage

Question 8

A student finds a marine animal with a stalk as an adult, which attaches to the substrate. To which class does this animal most likely belong?

Accepted Answer

Crinoidea

Question 9

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

Accepted Answer

Used for locomotion, gas exchange, sensing, and feeding

Question 10

Which of the following is a correct statement about the development of protostomes?

Accepted Answer

The blastopore forms the mouth

Question 11

Which phylum includes animals with a notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail?

Accepted Answer

Chordata

Question 12

Which of the following is a challenge faced by terrestrial protostome taxa?

Accepted Answer

Maintaining water balance

Question 13

Which class of echinoderms has ossicles fused into a rigid structure called a test?

Accepted Answer

Echinoidea

Question 14

Which of the following is true about the symmetry of echinoderm larvae and adults?

Accepted Answer

Larvae have bilateral symmetry, adults have pentaradial symmetry

Question 15

Which of the following is NOT a function of the water vascular system in echinoderms?

Accepted Answer

Production of gametes

Question 16

Which class of echinoderms is characterized by an elongated body, reduced ossicles, and a respiratory tree?

Accepted Answer

Holothuroidea

Question 17

Which of the following is a feature of the class Asteroidea?

Accepted Answer

Tube feet are responsible for locomotion

Question 18

Which of the following equations best represents the hydrostatic extension of a tube foot in echinoderms?

Accepted Answer

$$P_1V_1 = P_2V_2$$

Question 19

Which of the following is a correct pairing of echinoderm class and common name?

Accepted Answer

Crinoidea - sea lilies

Question 20

Which of the following is a function of the madreporite in echinoderms?

Accepted Answer

Acts as a sieve for water entering the water vascular system

Deuterostomes and Echinoderm Diversity: Structure, Function, and Classification

Guida di studio - Domande di pratica