Identify A to E .

The diagram represents the reproductive organ of male cockroach. Choose the correct combination of labelling

Select the correct option with respect to cockroaches

Solution

In cockroaches,males bear a pair of short,thread like anal styles which are absent in females

Identify the tissue shown in the diagram and match with its characteristcs and its location

Skeletal muscle, shows striations and closely attached with the bones of the limbs
Smooth muscles, show branching, found in the walls of the heart
Cardiac muscles,unbranched muscles, found in the walls of the heart
Striated muscles, tapering at both-ends, attached with the bones of the ribs

Solution

Skeletal muscle tissue is closely attached to sketetal bones. In a typical muscle such as the biceps, striated(striped) skeletal muscle fibres are bundled together in a parallel fashion

What external changes are visible after the last moult of a cockroach nymph?

Solution

The development of cockroach is paurometabolous meaning that their development is through nymphal stage. The nymphs look very much like adults.The nymph grows by moulting about 13 times to reach adult form. The last nymphal stage has wingpads while adult cockroaches have wings.

Blood cells which show phagocytosis is

Solution

Monocytes are largest leucocytes, size 12-20 mm life span variable, from a few to several days, nucleus bean-shaped and phagocytic nature.

Cells that maintain marrow cells are called

Which of the following is correctly stated as it happens in the common cockroach ?

Malpighian tubules are excretory organs projecting out from the colon
Oxygen is transported by haemoglobin in blood
Nitrogenous excretory product is urea
The food is ground by mandibles and gizzard Cockroach takes the food after grounding by its mandibles and gizzard.

Solution

Cockroach takes the food after grounding by its mandibles and gizzard.

Mast cells are associated with

In which one of the following preparations are your likely to come across cell junctions most frequently ?

Solution

It is ciliated epithelium which bears numerous delicated hair like outgrowths the cilia, arising from basal granules.The cilia remains inrhythmic motion and creates current to transport the materials which comes in contact with them.

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