Multiple Choice Questions

Advertisement

Which of the following have porous body and are diploblastic?

  • Aurelia and Obelia

  • Adamsia and Euplectella

  • Leucosolenia and Spongilla

  • Sycon and Hydra


C.

Leucosolenia and Spongilla

Leucosolenia is a genus of calcareous sponges belonging to the family Leucosoleniidae. It appears as groups of curved vases, up to 2 cm long, each ending in an osculum.

Spongillia is a genus of freshwater sponges in the family Spongillidae found in lakes and slow streams.


Advertisement

Microvilli of intestinal epithelium are similar in function with 

  • typhlosole in earthworm

  • hepatic caecae in cockroach

  • intestinal caecum in earthworm

  • Malpighian tubules in coackroach


Chemosensitive area of respiratory centre in medulla is affected by

  • less CO2 and H+ ions

  • less O2 and Hions

  • excess CO2 and H+ ions

  • excess O2 and Hions


The taxon which includes related species is

  • class

  • order

  • family

  • genus


Animals take phosphorus from

  • water

  • plants

  • rock

  • soil


Advertisement

Cyclic photophosphorylation involves

  • PS I

  • PS II

  • PS I and PS II

  • P680


Which one is correct regarding electrocardiograph (ECG)?

  • P- wave represents the electrical excitation of the ventricle.

  • QRS complex represents repolarisation of the ventricles

  • T- wave represents repolarisation of the atria

  • By counting the number of QRS complexes one can determine the pulse rate


The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and bronchi are known as

  • squamous epithelium

  • ciliated epithelium

  • columnar epithelium

  • cubical epithelium


What are Singer and Nicolson known for?

  • One-gene-one-enzyme hypothesis

  • Plasma membrane modifications

  • Fluid-mosaic model of plasma membrane

  • Structure of DNA


Advertisement

What is the effect of GnRH produced by hypothalamus?

  • Stimulates the synthesis and secretion of androgens

  • Stimulates secretion of milk in mammary glands

  • Stimulates foetal ejection reflex

  • Stimulates synthesis of carbohydrates from non- carbohydrates in liver