The function of the gap junction is to

1. Perform cementing to keep neighbouring cells together

2. Facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules

3. Separate two cells from each other

4. Stop substances from leaking across a tissue

Subtopic:  Glandular Epithelium & Cell Junction |
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The body cells in Cockroach discharge the nitrogenous waste in the hemolymph mainly in the form of

1. Ammonia

2. Potassium urate

3. Urea

4. Calcium carbonate

Subtopic:  Cockroach: Excretory System |
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Erythropoiesis starts in

1. kidney

2. liver

3. spleen

4. red bone marrow

 

Subtopic:  Connective Tissue |
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The terga sterna and pleura of cockroach body are joined by
1. cementing glue
2. muscular tissue
3. arthrodial membrane
4. cartilage

 

Subtopic:  Cockroach: Intro & External Morphology |
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Choose the correctly matched pair:

1. Tendon-Specialized connective tissue

2. Adipose tissue-Dense connective tissue

3. Areolar tissue- Loose connective tissue

4. Cartilage- Loose connective tissue

Subtopic:  Connective Tissue |
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Choose the correctly matched pair

1. Inner lining of salivary  ducts- Ciliated epithelium

2. Moist surface of buccal cavity- Glandular epithelium

3. Tubular parts of nephrons- Cuboidal epithelium

4. Inner surface of bronchioles- Squamous epithelium

Subtopic:  Simple Epithelium |
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What external changes are visible after the last moult of a cockroach nymph ?
1. Anal cerci develop
2. Both fore wings and hind wings develop
3. Labium develops
4. Mandibles become harder

 

Subtopic:  Cockroach: Female Reproductive System |
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Compared to those of humans, the erythrocytes in frog are

1. Without nucleus but with haemoglobin

2. Nucleated and with haemoglobin

3. Very much smaller and fewer

4. Nucleated and without haemoglobin

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Select the correct statement from the ones given below with respect to Periplaneta americana.
1. Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of lingitudinal connectives
2. Males bear a pair of short thread like anal styles
3. There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut
4. Grinding of food is carried out only by the mouth parts

Subtopic:  Cockroach: Intro & External Morphology |
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The supportive skeletal structures in the human external ears and in the nose tip are examples of :
1.  Areolar tissue
2.  Bone
3.  Cartilage
4.  Ligament

Subtopic:  Connective Tissue |
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