In animals coordination is achieved by means of_____.

1. 1. Respiratory system
   2. Nervous system
   3. Endocrine system
   4. Both b and c

Lungs are covered with double layered thin membranous sac called_____.

1. 1. Rib cage
   2. Disphragm
   3. Pericardium
   4. Pleura

Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining_____.

1. 1. Trimethylamine oxide
   2. Ammonia
   3. Trimethyl alanine
   4. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment

Biometry is the application of_____in biology.

1. 1. Matrix
   2. Statistics
   3. Geometry
   4. Algebra

Which pollutant may lead to “Black foot disease”?

1. 1. Cd
   2. Hg
   3. As
   4. Cu

Which part of the nervous system controls the activities of internal organs_____.

1. 1. Medulla Oblongata
   2. Spinal cord
   3. Cerebrum
   4. Cerebellum

Each human kidney receives _____ of total cardiac out put?

1. 1. 10%
   2. 30%
   3. 20%
   4. 40%

Dysentery is a disease that can lead to severe diarrhea with mucus or blood in the feces caused by inflammation in _____.

1. 1. Stomach
   2. Colon
   3. Small intestine
   4. Liver

The elimination of toxic nitrogenous waste and excess water in man is by_____.

1. 1. Circulation
   2. Excretion
   3. Reproduction
   4. Pollution 

Pseudocoelem develops from_____.

1. 1. Blastopore
   2. Plastoquinone
   3. Splitting of mesoderm
   4. Blastocoel