1.
Millipedes belong to the arthropod classA) Hexapoda. B) Chilopoda. C) Diplopoda. D) Crustacea. 2.
Centipedes belong to the arthropod classA) Hexapoda. B) Chilopoda. C) Diplopoda. D) Crustacea. 3.
Members of this class feed on decaying plant matter, possess repugnatorial glands, and possess two pairs of appendages per apparent segment.A) Hexapoda B) Chilopoda C) Diplopoda D) Crustacea 4.
Members of this class live in forest-floor litter, where they feed on fungi, humus, and other decaying organic matter. Their body consists of 11 segments and 9 pairs of legs.A) Symphyla B) Chilopoda C) Diplopoda D) Pauropoda 5.
The thoracic tagmata of an insect often has a pair of wings onA) the prothorax only. B) the prothorax and mesothorax. C) the mesothorax and metathorax. D) the metathorax only. 6.
Insect flight, in which muscles act to change the shape of the exoskeleton during both upward and downward wing beats, is called ______ flight.A) synchronous B) asynchronous C) tympanal D) regulatory 7.
Which of the following mouthparts of a chewing insect, like a grasshopper, is primarily a sensory, liplike structure and is the anterior-most mouthpart?A) mandible B) maxilla C) labrum D) labium 8.
The smallest branches of an insect's respiratory system exchange respiratory gases at the level of body cells. These smallest branches are calledA) tracheal trunks. B) tracheoles. C) Malpighian tubules. D) Johnston's organs. 9.
Sensory structures found in the legs of crickets, the abdomen of grasshoppers, and the thorax of some moths detect pressure (sound) waves in the air. These sensory structures are calledA) ommatidia. B) tympanal organs. C) Johnston's organs. D) Malpighian organs. 10.
The light collecting area of a compound eye that converts light energy into a nerve impulse is called theA) retinula cell. B) crystalline cone. C) rhabdome. D) pigment cell. 11.
A ______ is (are) a protective case(s) for the pupal stage of an insect that is formed from the last larval exoskeleton.A) cocoon B) puparium and cocoon C) puparium and chrysalis D) chrysalis and cocoon 12.
Insect development in which immatures are very different from the adult in body form, behavior, and habitat is called ______ metamorphosis.A) ametabolous B) hemimetabolous C) holometabolous 13.
The earliest insects likely exhibited ______________________ metamorphosis.A) ametabolous B) hemimetabolous C) holometabolous 14.
The most successful groups of insects exhibit __________________ metamorphosis.A) ametabolous B) hemimetabolous C) holometabolous 15.
In haplodiploid insects, sisters are related by ______A) 25%. B) 50%. C) 75%. D) 100%. 16.
Mayfly development occurs through a gradual series of changes, but the immatures are very different from the adults. These immatures are called _________________.A) larvae B) nymphs C) naiads D) pupae 17.
Insect development in which molting continues after sexual maturity and in which immatures resemble adults is called ______ metamorphosis.A) ametabolous B) hemimetabolous C) holometabolous 18.
Social insects include those in the ordersA) Isoptera and Diptera. B) Diptera and Coleoptera. C) Diptera and Hymenoptera. D) Hymenoptera and Isoptera. 19.
Myriapoda includes scorpions, centipedes, and proturans.A) True B) False 20.
The wings of a midge may beat at frequencies of 1,000 cycles per second, which is much faster than the frequency of nerve impulses to flight muscles.A) True B) False 21.
Insects are not capable of regulating their body temperature.A) True B) False 22.
Gas exchange in insects involves respiratory pigments dissolved in the hemolymph.A) True B) False 23.
Insects excrete uric acid using Malpighian tubules, which empty into the gut tract at the junction of the midgut and the hindgut. Because uric acid can be excreted as a semisolid, this excretory mechanism minimizes water loss and aids an insect's life on land.A) True B) False 24.
Even though it can be very complex, most insect behavior is the result of reflexes programmed by specific neural connections.A) True B) False 25.
An insect's compound eyes probably form images, but more importantly, they are adapted for detecting movement.A) True B) False 26.
Most of the water and salts present in the digestive tract of an insect are absorbed from the digestive tract through the midgut.A) True B) False 27.
Recent reevaluations of arthropod phylogeny suggest that the subphylum Crustacea may be a paraphyletic group.A) True B) False 28.
Because insects are vectors for diseases that affect humans; their economic cost to humans far outweighs their beneficial effects.A) True B) False 29.
Virtually all zoologists agree that the phylum Arthropoda is a monophyletic grouping.A) True B) False 30.
The first insects likely arose around 35 million years ago.A) True B) False