MCQ Bank
Tracheae in arachnids open to the outside via ________.
- A) Spiracles
- B) Nephridiopore
- C) Mouth
- D) Anus
Malacostraca has _____ chambered stomach.
- A) 2
- B) 4
- C) 3
- D) 1
Which of the following is considered as modification of book gills?
- A) Eustachian Tubule
- B) Body surface
- C) Book lungs
- D) Spiracles
All crustacean appendages, except_________, have presumably evolved from an ancestral biramous form
- A) Second antennae
- B) Head
- C) First antennae
- D) Thorax
Word Crustacea literally means ________.
- A) Irregular shelled
- B) Soft shelled
- C) Hard shelled
- D) Porous shelled
The planktonic nauplius of barnacles is followed by a planktonic larval stage, called a ______larva.
- A) Chitons
- B) Cypris
- C) Nymph
- D) Trochophore
Copepods have a cylindrical body and a median ocellus that develops in the ______ stage and persists into the adult stage.
- A) Nymph
- B) Chiton
- C) Trochophore
- D) Nauplius
Major excretory product in arachnids is ____________.
- A) Ammonia
- B) Uric acid
- C) Urea
- D) Pure nitrogen
How many pairs of antennae subphylum crustacea have?
- A) 1
- B) 3
- C) 2
- D) 4
The lense system of compound eye consists of of 25 to 14,000 individual receptors called ______.
- A) Ommatidia
- B) Statocyst
- C) Sensillum
- D) Ocelli
Fairy shrimp and brine shrimp comprise the order ______.
- A) Rhynchonellida
- B) Thecideida
- C) Anostraca
- D) Pentamerida
In cirripeda thoracic appendages are modified for __________.
- A) Walking
- B) Filtering
- C) Predation
- D) Swimming
Which of the following is the primary excretory product of cray fish?
- A) Creatinine
- B) Urea
- C) Uric Acid
- D) Ammonia
Which of the following is not the part of gut of arachnids?
- A) Hind Gut
- B) Mid Gut
- C) Malpighian tubules
- D) Fore Gut
Which of the following statement is false about reproductive system of arachnids except spiders?
- A) Dioecious
- B) Sperm packaging in spermetaphore in male
- C) Paired genital openings are on the ventral side
- D) Sperms transfer is usually direct
Which of the following is correct sequence of arachnid’s life cycle?
- A) Egg sac > Egg > Spiderling > Adult
- B) Egg sac > Spiderling > Egg > Adult
- C) There is no specific order
- D) Egg > Egg sac > Spiderling > Adult
The gut tract of arachnids is divided into _______ regions.
- A) 4
- B) 3
- C) 1
- D) 2
Which of the following arachnids consists of central nervous system?
- A) Leeches
- B) Scorpions
- C) Ticks
- D) Spiders
In arachnids most mechanoreceptors and chemoreceptors are modifications of _______.
- A) Nervous system
- B) Jointed appendages
- C) Skin
- D) Exoskeleton
Sea spiders belong to ______.
- A) Cirripeda
- B) Copepoda
- C) Pycnogonida
- D) Insecta