The respiratory system of cockroach consists of a network of tracheae that open through how many spiracles present on the lateral side of the body?
1. 5
2. 5 pairs
3. 20
4. 20 pairs

Identify the incorrect statement regarding the blood vascular system of cockroach:
1. Blood vessels are poorly developed and open into hemocoel
2. The hemolymph is composed of colorless plasma and hemocytes
3. Heart lies along the mid-ventral line of thorax and abdomen
4. Blood from sinuses enter heart through ostia

Which of the following mouth parts of cockroach are paired?

The exoskeletal plates in the exoskeleton of cockroach are joined to each other by:

Which of the following animal tissues can be derived from all three embryonic germ layers?
1. Epithelium
2. Connective
3. Muscle
4. Neural

What cell secrets the myelin sheath around the axolemma in central nervous system?
1. Schwann cell
2. Oligodendrocyte
3. Astrocyte
4. Microglial cell

Epithelial tissue:
1. has a blood supply and a nerve supple
2. has a blood supply but no nerve supply
3. has a nerve supply but no blood supply
4. lacks a blood supply and a nerve supply

The calcium binding protein, troponin, is found in:
I. Skeletal muscle
II. Smooth muscle
III. Cardiac muscle

1. Only I
2. Both I and II
3. Both I and III
4. I, II and III

Match bone cells in Column I with their function in Column II and select the correct answer from the code given:

Code
    A B C D
1. a b c d
2. b a d c
3. a c d b
4. a d c b

Presence of intercalated discs help cardiac muscles to act as a functional syncytium. This is possible because the structure of these discs have: