MCQ Bank
In arachnids tracheae tubes are lined by _____ to prevent water loss.
- A) Chitin
- B) Terpenes
- C) Wax
- D) Resins
The excretory organs of crayfish are called ________.
- A) Coxal Glands
- B) Androgenic Glands
- C) Antennal Glands
- D) Adrenal glands
Some sea spiders feed by sucking prey tissues through ______.
- A) Antennae
- B) Proboscis
- C) Thoracic Appendages
- D) Tentacles
Crabs and their relatives have a second larval stage called _________.
- A) Nauplius
- B) Tadpole
- C) Nymph
- D) Zoea
Which of the following arachnids consists of central nervous system?
- A) Leeches
- B) Scorpions
- C) Ticks
- D) Spiders
Displacement of the seta initiates a nerve impulse in _______associated with the base of the seta.
- A) Antennae
- B) Chemoreceptor
- C) Serotinin
- D) Sensillum
In cray fish the space between the carapace and the lateral body wall is called?
- A) Heart
- B) Tagma
- C) Tracheae
- D) Gills
Which type of receptors are important for spiders that make web for detection of insects on the web?
- A) Vibration receptors
- B) Setae
- C) Invaginations in exoskeleton
- D) Eyes
The chemical sense of arachnids is comparable to ________ and ________in vertebrates.
- A) Taste and smell
- B) Touch and vision
- C) Vision and smell
- D) Taste and vision
In cirripeda thoracic appendages are modified for __________.
- A) Filtering
- B) Predation
- C) Swimming
- D) Walking
Respiratory pigment present in blood od cray fish is called______.
- A) Hemoglobin
- B) Steroids
- C) Myoglobin
- D) Hemocyanin
Respiratory pigment present in arachnid’s blood is __________.
- A) Myoglobin
- B) Steroids
- C) Hemoglobin
- D) Hemocyanin
Lobsters belong to which class of Crustacea?
- A) Cirripeda
- B) Branchiopoda
- C) Malacostraca
- D) Copepoda
Which of the following statement about nervous system of arachnids is incorrect?
- A) The cerebral ganglion (brain) gives rise to the nerves to the eyes and the chelicerae.
- B) Ganglia are associated with various body segments
- C) Ventral solid nerve cord
- D) Ganglia are unfused
How many pairs of antennae subphylum crustacea have?
- A) 2
- B) 3
- C) 4
- D) 1
Major excretory product in arachnids is ____________.
- A) Ammonia
- B) Urea
- C) Uric acid
- D) Pure nitrogen
Androgenic glands in cray fish are present in ________.
- A) Abdomen
- B) Thorax
- C) Cephalothorax
- D) Mouth
In Arachnids powerful abdominal flexor muscles of the abdomen contract alternately with weaker extensor muscles, causing the abdomen to flex. This is called?
- A) Inductive stroke
- B) Recovery stroke
- C) Deductive stroke
- D) Propulsive stroke
Sea spiders belong to ______.
- A) Pycnogonida
- B) Copepoda
- C) Cirripeda
- D) Insecta
Which of the following statement is false about circulatory system of arachnids?
- A) Arachnid blood contain respiratory pigment
- B) Open circulatory system
- C) Blood bathes the tissues directly
- D) Blood vessels provide track of blood passage