Structural Organisation in Animals

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

Consider the following four statements (A–D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F). Statements:

1. A-T, B-F, C-F, D-T
2. A-T, B-T, C-F, D-F
3. A-F, B-F, C-T, D-T
4. A-F, B-T, C-T, D-F

Ureters act as urinogenital ducts in

1. human males
2. human females
3. both male and female frogs
4. male frogs

The type of muscles present in our

1. heart is involuntary and unstriated smooth muscles
2. intestine is striated and involuntary
3. thigh is striated and voluntary
4. upper arm is smooth muscle and fusiform in shape.

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