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

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

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

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

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

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

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