Question 1

Compared to earthworms,freshwater oligochaetes

Accepted Answer

A) have more conspicuous setae. 
B) have better-developed sense organs. 
C) are more mobile. 
D) All of the choices are correct. 
E) None of the choices is correct. 
A) have more conspicuous setae. 
B) have better-developed sense organs. 
C) are more mobile. 
D) All of the choices are correct. 
E) None of the choices is correct.

Question 2

The cocoon in the earthworm is produced by the

Accepted Answer

A) clitellum. 
B) prostomium. 
C) calciferous glands. 
D) chloragogen cells. 
E) typhlosole. 
A) clitellum. 
B) prostomium. 
C) calciferous glands. 
D) chloragogen cells. 
E) typhlosole.

Question 3

Earthworms are hermaphroditic.Is this an evolutionary relic where they have been unable to evolve separate sexes,or is this an advantage for an organism with their life style? Explain your answer.

Accepted Answer

The answer of Earthworms are hermaphroditic.Is this an evolutionary relic...

Question 4

Speculate why polychaetes are overwhelmingly marine organisms.

Accepted Answer

Polychaetes are overwhelmingly marine or

Question 5

The polychaetes

Accepted Answer

A) belong to the smallest and most evolutionarily derived group of annelids. 
B) are mostly freshwater inhabitants. 
C) are mostly terrestrial,living in moist soil. 
D) consist of active predators and sedentary particle feeders. 
E) cannot tolerate brackish or marine salinity. 
A) belong to the smallest and most evolutionarily derived group of annelids. 
B) are mostly freshwater inhabitants. 
C) are mostly terrestrial,living in moist soil. 
D) consist of active predators and sedentary particle feeders. 
E) cannot tolerate brackish or marine salinity.

Question 6

The temporary food storage organ in the earthworm is the _________________.

Accepted Answer

The answer of The temporary food storage organ in the...

Question 7

Reproduction in the earthworm involves

Accepted Answer

A) asexual budding. 
B) self-fertilization. 
C) cross-fertilization between two dioecious organisms. 
D) cross-fertilization between two hermaphroditic organisms. 
E) reproduction by "stem mothers." 
A) asexual budding. 
B) self-fertilization. 
C) cross-fertilization between two dioecious organisms. 
D) cross-fertilization between two hermaphroditic organisms. 
E) reproduction by "stem mothers."

Question 8

Polychaetes crawl by means of leg-like ________ which also serve in respiration.

Accepted Answer

A) aortic arches 
B) metanephridia 
C) clitella 
D) palps 
E) parapodia 
A) aortic arches 
B) metanephridia 
C) clitella 
D) palps 
E) parapodia

Question 9

Gas exchange in the earthworm occurs through the

Accepted Answer

A) gills. 
B) metanephridia. 
C) skin. 
D) setae. 
E) typhlosole. 
A) gills. 
B) metanephridia. 
C) skin. 
D) setae. 
E) typhlosole.

Question 10

Leeches

Accepted Answer

A) are mostly found in fresh water. 
B) are largely "micropredators" but sometimes parasites. 
C) may be carnivores on small invertebrates. 
D) are more abundant in the tropics. 
E) All of the choices are correct. 
A) are mostly found in fresh water. 
B) are largely "micropredators" but sometimes parasites. 
C) may be carnivores on small invertebrates. 
D) are more abundant in the tropics. 
E) All of the choices are correct.

Question 11

Many polychaetes are euryhaline meaning that they

Accepted Answer

A) can tolerate a wide range of salinity. 
B) must live in marine conditions. 
C) possess both male and female reproductive organs. 
D) always live in tubes. 
E) lack any circulatory system. 
A) can tolerate a wide range of salinity. 
B) must live in marine conditions. 
C) possess both male and female reproductive organs. 
D) always live in tubes. 
E) lack any circulatory system.

Question 12

In contrast to roundworms,how do segmented worms elongate or stretch lengthwise?

Accepted Answer

A) Contracting the longitudinal muscles 
B) Contracting circular muscles 
C) Forcibly expanding the circular muscles 
D) Forcibly expanding longitudinal muscles 
E) Snapping back to original shape of the hard cuticle 
A) Contracting the longitudinal muscles 
B) Contracting circular muscles 
C) Forcibly expanding the circular muscles 
D) Forcibly expanding longitudinal muscles 
E) Snapping back to original shape of the hard cuticle

Question 13

Discuss the importance of a trochophore larva in both the Annelida and the Mollusca.

Accepted Answer

The trochophore larva is an important de

Question 14

The anterior-most and posterior-most portions of the annelid body are the ______________________ and pygidium,respectively.

Accepted Answer

The answer of The anterior-most and posterior-most portions of the...

Question 15

Members of the Phylum Sipuncula are also known as the

Accepted Answer

A) bryzoans. 
B) beard worms. 
C) tongue worms. 
D) peanut worms. 
E) None of the choices is correct. 
A) bryzoans. 
B) beard worms. 
C) tongue worms. 
D) peanut worms. 
E) None of the choices is correct.

Question 16

Older taxonomic treatments represent the Annelida as consisting of three classes: Polychaeta,Oligochaeta,and Hirudinea.Compare and contrast that representation to what we know about phylogenetic relationships within the phylum today.

Accepted Answer

Older taxonomic treatments of the phylum

Question 17

Darwin observed earthworm behavior where a worm would seize a leaf fragment by its narrow end in order to pull the leaf into its burrow.This behavior is

Accepted Answer

A) evidence of high level reasoning. 
B) mainly a product of trial and error. 
C) genetic or innate. 
D) proof of an extensive ability to learn. 
E) now known to be totally random. 
A) evidence of high level reasoning. 
B) mainly a product of trial and error. 
C) genetic or innate. 
D) proof of an extensive ability to learn. 
E) now known to be totally random.

Exam 17: Annelids and Allied Taxa

Compared to earthworms,freshwater oligochaetes

The cocoon in the earthworm is produced by the

Earthworms are hermaphroditic.Is this an evolutionary relic where they have been unable to evolve separate sexes,or is this an advantage for an organism with their life style? Explain your answer.

Speculate why polychaetes are overwhelmingly marine organisms.

The polychaetes

The temporary food storage organ in the earthworm is the _________________.

Reproduction in the earthworm involves

Polychaetes crawl by means of leg-like ________ which also serve in respiration.

Gas exchange in the earthworm occurs through the

Leeches

Many polychaetes are euryhaline meaning that they

In contrast to roundworms,how do segmented worms elongate or stretch lengthwise?

Discuss the importance of a trochophore larva in both the Annelida and the Mollusca.

The anterior-most and posterior-most portions of the annelid body are the ______________________ and pygidium,respectively.

Members of the Phylum Sipuncula are also known as the

Older taxonomic treatments represent the Annelida as consisting of three classes: Polychaeta,Oligochaeta,and Hirudinea.Compare and contrast that representation to what we know about phylogenetic relationships within the phylum today.

Darwin observed earthworm behavior where a worm would seize a leaf fragment by its narrow end in order to pull the leaf into its burrow.This behavior is

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