Given below are two statements: Statement I: Ligaments are dense irregular tissue Statement II: Cartilage is dense regular tissue.
In the light of above statements choose the correct answer from the option given below:
In cockroach, excretion is brought about by:
A.Phallic gland
B.Urecose gland
C.Ncphrocytes
D.Fat body
E.Collatcrial glands
Choose the correct answer from the options given below:
AI-generated explanation. Check against your textbook.
Explanation:
Tegmina are the thickened, protective forewings of cockroaches and other insects. They arise from the mesothorax (the second thoracic segment). Thus, option 2 is correct. The hindwings, when present, develop from the metathorax and are usually folded under the tegmina.
🧠 Did You Know?
In cockroaches, the forewings (tegmina) act as protective covers for the delicate hindwings and abdomen when at rest.
💡 NCERT Memory Line:
The forewings are the tegmina and are derived from the mesothorax, while hindwings come from the metathorax.
Which of the following characteristics is incorrect
with respect to cockroach?
AI-generated explanation. Check against your textbook.
Explanation:
The incorrect statement is option 1. In cockroaches, gastric caeca are present at the junction of foregut and midgut, not at the junction of midgut and hindgut. Thus, the described location “junction of midgut and hind gut” is wrong according to NCERT.
🧠 Did You Know?
Hypopharynx is a tongue-like structure located within the mouth cavity (the cavity enclosed by the mouthparts) and helps in manipulating food.
💡 NCERT Memory Line:
In female cockroach, the genital pouch is formed by specific sternites (generally described in NCERT as formed by the 7th–9th sternites in some texts), assisting in reproductive anatomy.