MCQ Bank
Tubule systems, called tracheae in arachnids open to the outside through openings called __________.
- A) book lungs
- B) ostia
- C) osculum
- D) spiracles
Which of the following statement about nervous system of arachnids is incorrect?
- A) Ganglia are associated with various body segments
- B) Ganglia are unfused
- C) Ventral solid nerve cord
- D) The cerebral ganglion (brain) gives rise to the nerves to the eyes and the chelicerae.
The chemical sense of arachnids is comparable to ________ and ________in vertebrates.
- A) Taste and smell
- B) Taste and vision
- C) Vision and smell
- D) Touch and vision
Which of the following is the primary excretory product of arachnids?
- A) Guanine
- B) Uric acid
- C) Ammonia
- D) Urea
Ladder like the nervous system is found in _______.
- A) Cephalopoda
- B) Crustacea
- C) Bivalvia
- D) Insecta
Malpighian tubules are located at juncture between ______ & _______.
- A) Foregut and midgut
- B) Hindgut and Anus
- C) Midgut and hindgut
- D) Midgut and foregut
Which of the following statement is false about circulatory system of arachnids?
- A) Blood vessels provide track of blood passage
- B) Blood bathes the tissues directly
- C) Open circulatory system
- D) Arachnid blood contain respiratory pigment
Androgenic hormones in cray fish promote the development of _________.
- A) Female secondary characteristics
- B) Ovary
- C) Testes
- D) Egg and sperm
Which of the following structure allow larval crustaceans to orient toward or away from the light?
- A) Sensillum
- B) Ocelli
- C) Statocyst
- D) Ommatidia
Which of the following structures are involved in osmoregulation?
- A) Gill surfaces
- B) Tail
- C) Cephalothorax
- D) Mouth
In cray fish the space between the carapace and the lateral body wall is called?
- A) Tracheae
- B) Tagma
- C) Heart
- D) Gills
Respiratory pigment present in arachnid’s blood is __________.
- A) Myoglobin
- B) Hemocyanin
- C) Steroids
- D) Hemoglobin
In crey fish Many larvae are planktonic and use their ________ to orient toward surface waters.
- A) Ommatidia
- B) Sensillum
- C) Ocelli
- D) Statocyst
Book gills are present in ____________.
- A) Cirripedia
- B) Annelids
- C) Merostomata
- D) Trilobitomorpha
A seta is a hair like modification of the _______ set in a membranous socket.
- A) Cuticle
- B) Mouth
- C) Skin
- D) Chitin
Amoeboid cells in the blood of arachnids are specialized for ___________.
- A) Excretion
- B) Defense
- C) Coordination
- D) Digestion
Respiratory pigment present in blood od cray fish is called______.
- A) Hemoglobin
- B) Steroids
- C) Myoglobin
- D) Hemocyanin
The lens of spider eye is a thickened, transparent modification of the _______.
- A) Cuticle
- B) Mouth
- C) Skin
- D) Chitin
My nutrition, most arachnids are ________.
- A) Herbivores
- B) Decomposers
- C) Omnivores
- D) Carnivores
In spiders, copulation occurs and _____ part of male is used to transfer male gametes.
- A) Hemipenis
- B) Penis
- C) Pedipalps
- D) Exoskeleton