Chapter 13 Flashcards
True/False
Most species of insects have wings
True
The respiratory system in insects consists of specialized air tubes called _______
Tracheal system
Which of the following groups is known commonly as krill?
Euphausiacea
A characteristic unique to Crustacea is the possession of two pairs of ______
Antennae
Groups of somites fused to combined into functional groups are called ________
Tagmata
Ecdysis (molting) in crustaceans
(All of the above)
-involves production of a new cuticle and shedding of the old one.
- is initiated by a stimulus perceived by the central nervous system.
- involves a molt-inhibiting hormone produced by the X-organ of the eye stalk, and a molting hormone produced by the Y-organs near the mandibles.
A genetically programmed or environmentally induced arrest is development of some insects is called ______
Diapause
The head cuticle of many crustaceans extends posteriorly to form a dorsal covering called the _______
Carapace
Saprophagous insects feed on
Dead animals
True/False
Scorpions respire by means of book lungs
False
Arthropods are successful because they have
All of the above
- reduced competition through metamorphosis
- highly developed sensory organs
- a very efficient respiratory system
Crustaceans
All of the above
- are primarily free-living
- have two pairs of antennae
- are mainly marine, but there are freshwater and terrestrial species
The crustaceans that are sessile and enclosed in a shell of calcareous plates are called
Barnacles
Spiders
Have chelicerae that function as fangs
