MCQ Bank
In leeches, the clitellum is present only in which of the following season, when most leeches breed?
- A) spring
- B) winter
- C) summer
- D) autumn
Fertilization is __________ in most polychaetes, although a few species copulate.
- A) Viviparous
- B) External
- C) Ovoviviparous
- D) Internal
Chemical substance from which exoskeleton of arthropods is made is called?
- A) Chitin
- B) Waxes
- C) Phospholipids
- D) Cellulose
The digestive tract of oligochaetes is tubular and ________.
- A) Winded
- B) Coiled
- C) Straight
- D) Spiral
Most leeches ingest large quantities of blood and gorge their stomachs and increased their body mass 2 to ______ times.
- A) 4
- B) 8
- C) 10
- D) 20
Ventral nerve cords in the nervous system of leeches is fused at _______.
- A) Cerebrum
- B) Ganglia
- C) Notochord
- D) Vertebral column
Living arthropods are divided into _______ subphyla.
- A) 2
- B) 4
- C) 5
- D) 3
Which of the following is not the characteristic of animals belonging to phylum arthropods?
- A) Metamerism both internally and externally
- B) Jointed appendages
- C) Ecdysis of exoskeleton
- D) Ventral Nervous system
How many hearts are present in leeches?
- A) 2
- B) 1
- C) 3
- D) 4
Calciferous glands in oligocaetes are evaginations of the esophageal wall that rid the body of excess ______absorbed from food.
- A) Sodium
- B) Calcium
- C) Phosphorous
- D) Potassium
Which Hormone necessary for the process of ecdysis?
- A) Peptides
- B) Terpenes
- C) Ecdysone
- D) Amide
In some leeches, the anterior digestive tract is modified into a ______ proboscis, lined inside and outside by a cuticle.
- A) Relaxed
- B) Protrusible
- C) Expanded
- D) Contracted
Oligochaetes and leeches should be combined into a single group called _______.
- A) Arthropoda
- B) Polychaeta
- C) Arachnida
- D) Clitellata
____________ is the outermost layer of arthropods exoskeleton.
- A) Procuticle
- B) Cuticle
- C) Epicuticle
- D) Endocuticle
The excretory organs of annelids are called ___________.
- A) Metanephros
- B) Malphigian tubules
- C) Pronephros
- D) Nephridia
Class malacostraca includes all members except __________.
- A) Lobsters
- B) Sea spiders
- C) Crayfish
- D) Crabs
An aquatic larval stage that transforms into the land-dwelling frog is called_______.
- A) Oigopod
- B) Tadpole
- C) Apodous
- D) Polypod
Which of the following structure in arthropods provides better leverage for rapid movement?
- A) Clitellum
- B) Jointed appendages
- C) Setae
- D) Exoskeleton
Most zoologists believe that arachnids arose from the _________.
- A) Arthropods
- B) Bivalves
- C) Gastropods
- D) Eurypterids
A series of segments in the anterior half of an oligochaete is usually swollen into a girdlelike structure called the _____________.
- A) Clitellum
- B) Cocoon
- C) Prostomium
- D) Clitoria