✓✗The brain of frog is enclosed in a bony structure called the

✓✗Which of the following statements about the digestive system of cockroach are correct?
A. The entire foregut is lined by cuticle.
B. The gizzard has six chitinous teeth.
C. Gastric caeca are at the junction of midgut and hindgut.
D. The hindgut is differentiated into ileum, colon and rectum.
E. The crop is used for grinding food.
Choose the correct answer.

✓✗Which tissue is involved in functions like filtration and diffusion?

✓✗Which connective tissue has a fluid matrix (plasma) in which cells float?

✓✗The total number of spiracles in Periplaneta americana is

✓✗An organ such as the heart is made of

✓✗Which of the following characteristics is incorrect with respect to cockroach?

✓✗The exoskeleton of cockroach has hardened plates called sclerites. The dorsal sclerites are called

✓✗Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Cardiac muscle cells contract as a unit.
Reason (R): Communication junctions at fusion points (intercalated discs) allow neighbouring cardiac cells to be stimulated when one cell receives a signal to contract.
In the light of the above statements, choose the correct answer from the options given below.

✓✗If the thyroid is removed from a tadpole of frog,

✓✗The young one of cockroach is called a

✓✗Adhering junctions

✓✗Given below are two statements.
Statement I: Ligaments are dense irregular tissue.
Statement II: Cartilage is dense regular tissue.
In the light of the above statements, choose the correct answer from the options given below.

✓✗In cockroach, oxygen from the air reaches the body cells through which correct sequence?

✓✗In frog, the thin-walled urinary bladder is present