Structural Organisation in Animals

Frogs differ from humans in possessing :

1. hepatic portal system
2. paired cerebral hemispheres
3. nucleated red blood cells
4. thyroid as well as parathyroid

The cells lining the blood vessels belong to the category of :

1. Squamous epithelium
2. Columnar epithelium
3. Connective tissue
4. Smooth muscle tissue

Which one of the following structures in Pheretima is correctly matched with its function ?

1. Gizzard - absorbs digested food
2. Setae - defence against predators
3. Typhlosole - storage of extra nutrients
4. Clitellum - secretes cocoon

The ciliated columnar epithelial cells in humans are known to occur in :

1. Eustachian tube and stomach lining
2. Bile duct and oesophagus
3. Fallopian tubes and urethra
4. Bronchioles and Fallopian tubes

One very special feature in the earthworm Pheretima is that :

1. The S-shaped setae embedded in the integument are the defensive weapons used against the enemies
2. It has a long dorsal tubular heart
3. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
4. Fertilisation of eggs occurs inside the body

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

1. Oxygen is transported by haemoglobin in blood
2. The food is ground by mandibles and gizzard
3. Nitrogenous excretory product is urea
4. Malpighian tubules are excretory organs projecting out from the colon

The cells lining the blood vessels belong to the category of :

1. Columnar epithelium
2. Connective tissue
3. Smooth muscle tissue
4. Squamous epithelium

If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is

1. coelomic fluid
2. haemolymph
3. slimy mucus
4. excretory fluid

Which one of the following correctly describes the location of some body parts in the earthworm Pheretima?

1. Two pairs of testes in 10th and 11th segments.
2. One pair of ovaries attached at intersegmental septum of 14th and 15th segments.
3. Two pairs of accessory glands in 16–18 segments
4. Four pairs of spermathecae in 4–7 segments

Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it?

1. Biceps of upper arm – smooth muscle fibres
2. Iris – Involuntary smooth muscle
3. Abdominal wall – smooth muscle
4. Heart wall – Involuntary unstriated muscle