Arthropods Flashcards
The cuticle of arthropods is composed of a thicker inner _____layer, and a thinner outer layer, the ____. The macromolecule that characterizes the cuticle is _____.
Procuticle, Epicuticle, Chitin
The nonliving exoskeleton inhibits growth. To cope with this situation, arthropods use a process to shed the old exoskeleton called _____.
Ecdysis
The ________ have been extinct for 250 million years but they show the basic pattern that started the arthropods.
Trilobites
The characteristics of four pairs of walking legs, a pair of pedipalps, and no mandible or antennae are found in …..
Chelicerata
What fits these characteristics: unsegmented carapace, spinelike telson, book gills, and marine habitat
Xiphosurida
The following group that has four pairs of thin walking legs, eats by sucking juices from hydroids, and is particularly common in polar oceans is……
Pychongonida
……… is called the giant water scorpion and is known from 200-million year-old fossils?
Eurypterida
Members of the class Arachnida are differentiated from other arthropods by having a ….. and ………
Cephalothorax, and abdomen
What order contains members who have a cephalothorax and abdomen with no external segmentation, and these tagmata are joined by a narrow pedicel?
Araneae
Which of the following traits are unique to spiders? A) Malpighian tubules B) book lungs C) simple eyes D) silk glands
D) Silk glands
The crustaceans are the only arthropods with A) head, thorax, and abdomen. B) two pairs of antennae. C) mandibles. D) biramous appendages.
B) Two pairs of antennae
A compound eye is made of many small units that have individual lens and nerves. These structures are called……
Ommatidia
The primitive larva of the crustaceans is the A) mysis. B) trochophore. C) protozoea. D) nauplius.
D) Nauplius
Which class can be recognized by having flattened, leaflike appendages used for respiration?
Branchiopoda
The subphylum Hexapoda is characterized by having three pairs of legs and includes the ________ and the _____.
Insects, and Entognaths
Insects undergo metamorphosis in order to grow and exploit different habitats. The individual stages in this process are called….
Nymphs = juvenile stages. Instars (More broad answer)
Most insects go through a complete change of body form from larva to pupa to adult; this is called ________ metamorphosis.
Holometabolous
The openings to the respiratory system of insects are the A) tracheoles. B) spiracles. C) labia. D) taenidia.
B) Spiracles
Which of the following are not respiratory mechanisms seen in insects, in either juvenile forms or adults? A) book lungs B) tracheal gills C) trachea D) diffusion
A) Book lungs
If an insect has an egg, nymphal stages, and finally an adult stages, it exhibits ________ metamorphosis.
Hemimetabolous
The arthropods have a metameric body with segments organized into functional groups called _____.
Tagmata
What is the basic Phylogeny of Arthropods
True tissue - Bilaterally symmetrical - Protostome development - Ecdysoza - Segmented
What are the general characteristics of Arthropods
Metamerism - Tagmatization - Exoskeleton - Jointed appendages - Discontinuous growth (1.4 factor) - Haemocoel open circulatory system - Solid nerve cord - Dioecious - Cephalization
What where some of the characteristics of Trilobita
One pair antennae - Biramous limbs - Oval flanternied shape (Series of segments)
