Figure 1714 Grasshopper genitalia. a. Females have an ovipositor, and b. males h

Question

Figure 1714 Grasshopper genitalia. a. Females have an ovipositor, and b. males have claspers at the distal end of the penis -clasper Ovipositor b. Internal Anatomy Observe a longitudinal section of a shown in Figure 17.13b. What is the function of Malpighian tubules? Conclusion: Comparison of Crayfish to Grasshopper grasshopper if available on demonstration. Try to locate the structures adaptations of a crayfish to those of a grasshopper by completing Table 17.3. Put a star beside each item that indicates an adaptation to life in the water (crayfish) and to life on land (grasshopper). Check with your instructor to see if you identified the maximum number of adaptations. Table 17.3 Comparison of Crayfish to Grasshopper Grasshopper Crayfish Locomotion Respiration Sense organs Nervous system External reproductive features Male Grasshopper Metamorphosis rphosis means a change, usually a drastic one, in form and shape. Grasshoppers undergo incomplete The immature stages of the grasshopper metamorphosis, a gradual change in form rather than a drastic change are called nymphs, and they are recognizable as grnasshoppers even though they differ somewhat in shape and form (Fig. 17.15a). insects three stages of development: larvae, pupa, and adult (Fig. 17.15b). Metamorphosis occurs during the pupa stage when the animal is enclosed within a hard covering. The animals best known for complete metamorphosis are the butterfly and the moth, whose larval stage is called a caterpillar and whose pupa stage is the cocoon; the adult is the butterfly or moth. o). Some insects undergo what is called complete metamorphosis, in which case they have 230 Laboratory 17 Invertebrates 17-18

Explanation / Answer

Crayfish. Grasshopper

Locomotion Use uropods for swimming have 4 pairs Have 3 pairs of legs for hoping and wings

Respiration. Have gills. For gaseous exchange. Use spiracles tubules and trachea

Sense organs Have tympanum receptor of sound Have hair like receptors

Nervous system nerve cord is ventral Nerve cord is ventral

Reproductive features: sperm transferred to female Male have Extra genital organ and female have ovipositor

Eggs carried externally The male reproductive organ transfers sperm to female

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