COCKROACH ANATOMY TRUE OR FALSE
1.The hindwings are opaque and leathery and are used in flight.
2. The mouth parts consisting of a labium (upper lip), a pair of mandibles, a pair of maxillae and a labrum (lower lip).
3.The anterior end of head bears appendages forming biting and chewing type of mouth parts.
4. The body of cockroaches is segmented and in each segment, exoskeleton has hardened plates called sternites dorsally.
5. Cockroaches are included in the class Arthropoda of phylum Insect.
6. Male cockroach can be differentiated from female cockroach on the basis of absence of anal styles.
7. The mouth opens into a short tubular pharynx through a narrow tubular passage called oesophagus.
8. Proventriculus has an inner layer of thin circular muscles and thick outer cuticle forming six highly chitinous plates called teeth.
9. In males, genital pouch or chamber lies at the hind end of abdomen bounded ventrally by 9th and 10th terga and dorsally by the 9th sternum.
10. Periplaneta americana are about 34-53 um long with wings that can beyond the tip of the abdomen in males.
11. Heart of cockroach consists of elongated muscular tube lying along mid ventral line of thorax and abdomen.
12. A ring of 6-8 blind tubules called hepatic caeca is present at the junction of foregut and midgut.
13. At the junction of midgut and hindgut is present another ring of 200-250 yellow coloured thin filamentous Malpighian tubules.
14. Female cockroach possesses sixteen ovarioles in each ovary.
15. A pair of spermatheca is present in the 6th segment of male cockroach.
16. In male cockroaches, the sperms are stored in the spermatophores.
17. In periplaneta americana, nervous system is located dorsally, consists of segmentally arranged ganglla joined by a pair of longitudinal connectives.
18. A mushroom shapedgland is present in the 6th-7th abdominal segments of male cockroach.
19. The food of the earthworm is decaying fallen leaves and organic matter mixed with soil.
20. Compared to those of humans, erythrocytes in frogs are non-nucleated and contains red coloured pigment namely haemoglobin.
21. The supra-oesophaeal ganglion of the cockroach are situated in ventral part of abdomen.
22. The head holds a bit of a nervous system while the rest is situated along the dorsal part of its body.
23. Cockroaches exhibit mosaic vision with less sensitivity and more resolution.
24. In earthworms, clitellum increases the effective area of absorption in the intestine.
25. In cockroaches, the fat body, nephridia and urecose glands also help in excretion.
26. In Pheretima, mature sperm and egg cells and nutritive fluid are deposited in cocoons produced by the gland cells of clitellum.
27. Excretion is performed by Malpighian tubules. Each tubule is lined by non-glanular and ciliated epithelium.
28. In earthworms, one pair of ovaries is attached at the inter-segmental septum of 17th to 19th segments.
29. Exchange of gases take place at the tracheoles by diffusion.
30. The respiratory system consists of network of trachea, that open through 10 small holes called spiracles present on the lateral side of the body.
31. In frogs, vascular system is well developed closed type and circulation of blood is achieved by the pumping action of muscular heart.
32. Two pairs of accessory glands are present in 16th to 18th segments of a male earthworm.
33. Two pairs of spermathecae are located in 6th-8th segments of earthworm.
34. In Pheretima, intestinal caecum neutralizes humic acid present in humus.
35.In each body segment of earthworms, except first and last, S-shaped setae are present.
ANSWER
1.(F) 2. (F) 3. (T) 4. (F) 5. (F) 6. (F) 7. (F) 8. (F) 9. (F) 10. (F)
11.(F) 12. (T) 13. (F) 14. (F) 15. (F) 16. (F) 17. (F) 18. (T) 19. (T) 20. (F)
21.(F) 22. (F) 23. (F) 24. (F) 25. (F) 26. (T) 27. (F) 28. (F) 29. (T) 30. (F)
31.(T) 32. (F) 33. (F) 34. (F) 35. (F)
