Metazoa Part 11

Question 1

Segmented bilaterally symmetrical worms are called

Answer 1

Annelids

Question 2

Triploblastic, unsegmented and bilaterally symmetrical coelomates are called

Answer 2

Molluscs

Question 3

Phylum ______ possess perivisceral coelom

Answer 3

Phylum annelida

Question 4

Excretory system of annelids is called

Answer 4

Nephridia and it is segmented and cilliated

Question 5

The cleavage of egg of annelids is

Answer 5

Spiral cleavage

Question 6

Phylum ______ have a typical trocophore larva

Answer 6

Phylum annelida

Question 7

The CNS comprises of a double ventral ganglionated nerve cord and paired cerebral ganglia. This is a feature of

Answer 7

Annelids

Question 8

Annelids possess chitinous chaetae arranged _______

Answer 8

Segmentally

Question 9

Annelids possess chaetae arranged ______

Answer 9

Segmentally

Question 10

Annelids are seperated into 3 classes namely

Answer 10

Class Polychaeta
Class Oligochaeta
Class Hirudinea

Question 11

Class polychaeta are commonly referred to as

Answer 11

Bristle worms

Question 12

The only annelids with distinct head are

Answer 12

Class polychaeta

Question 13

Polychaeta are dioecious

Answer 13

True

Question 14

The only class of annelida with suckers are

Answer 14

Class hirudinea

Question 15

In class polychaeta, fertilization is
External

Question 16

Gonads are localised but extend throughout the body. This is a feature of

Answer 16

Polychaeta

Question 17

They usually have biramous segmental parapodia

Answer 17

Class polychaeta

Question 18

Nereis, sabella, arenicola, aphrodite, eunice, glycera are examples of

Answer 18

Class polychaeta

Question 19

Class Oligochaeta are also called

Answer 19

Earthworms

Question 20

Class Oligochaeta are hermaphrodites

Answer 20

True

Question 21

Reproduction in class Oligochaeta is by

Answer 21

Copulation and cross fertilization

Question 22

The chaetae of Oligochaeta occur

Answer 22

Singly or in pairs
And they lack parapodia

Question 23

The head of Oligochaeta is reduced and lacks ______

Answer 23

Sensory appendages

Question 24

Lumbricus terrestris and tubifex tubifex are examples of class _____

Answer 24

Class Oligochaeta

Question 25

The body of its members of this class have 33/34 segments

Answer 25

Class hirudinea

Question 26

Class ______ lack chaetae and parapodia

Answer 26

Class hirudinea

Question 27

Class hirudinea are hermaphrodites

Answer 27

True

Question 28

Reproduction in class hirudinea is by

Answer 28

Cross fertilization

Question 29

Polychaeta are found in

Answer 29

Marine habitat

Question 30

Ectoparasites of vertebrates Free living predators Scavengers

Answer 30

Class hirudinea

Question 31

Hirudo medicinalis is an example of

Answer 31

Class hirudinea