Structural Organisation in Animals

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

1. Both fore wings and hind wings develop
2. Mandibles become harder
3. Labium develops
4. Anal cerci develop

Which one of the following is one of the paths followed by air or O2 during respiration in the adult male Periplaneta americana as it enters the animal body?

1. Spiracle in metathorax, trachea, tracheoles, oxygen diffuses into cells
2. Mouth, bronchial tube, trachea, oxygen enters cells
3. Spiracles in prothorax, tracheoles, trachea, oxygen diffuses into cells.
4. Hypopharynx, mouth, pharynx, trachea, tissues

Select the correct option with respect to Cockroaches :-

1. Nervous system comprises of a dorsal nerve cord and ten pairs of ganglion
2. The fore wings are tegmina which are used in flight
3. Malpighian tubules convert nitrogenous wastes into urea
4. Males bear short anal styles not present in females

Identify the tissue shown in the diagram and match with its characteristics and its location :- [Figure]

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

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labeled A, B, C and D and select the right option about them [Figure]

1. A Mast cell, B Collagen fibres, C Fibroblast, D Macrophage
2. A Mast cell, B Macrophage, C Fibroblast, D Collagen fibres
3. A Macrophage, B Fibroblast, C Collagen fibres, D Mast cell
4. A Macrophage, B Collagen fibres, C Fibroblast, D Mast cell

The supportive skeletal structures in the human external ears and in the nose tip are examples of

1. Ligament
2. Areolar tissue
3. Cartilage
4. Bone

The four sketches (A, B, C and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its correct location and function ? [Figure]

1. (A) Tissue Columnar epithelium, Location Nephron, Function Secretion and absorption
2. (C) Tissue Collagen fibres, Location Cartilage, Function Attach skeletal muscles to bones
3. (B) Tissue Glandular epithelium, Location Intestine, Function Secretion
4. (D) Tissue Smooth muscle tissue, Location Heart, Function Heart contraction

Pheretima and its close relatives derive nourishment from

1. sugarcane roots
2. decaying fallen leaves and soil organic matter
3. soil insects
4. small pieces of fresh fallen leaves of maize, etc.

Compared to those of humans, the erythrocytes in frog are :

1. Without nucleus but with haemoglobin
2. Very much smaller and fewer
3. Nucleated and with haemoglobin
4. Nucleated and without haemoglobin

Select the correct statement from the ones given below with respect to Periplaneta americana

1. Males bear a pair of short thread like anal styles
2. There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
3. Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives
4. Grinding of food is carried out only by the mouth parts