Biology

1. Monotremes are unique mammals because they

posses hair 

give birth to live young 

secret milk in a pouch 

lay eggs

2.Poison glands of snakes are homologous to

electric organs of fishes 

stings of rays

sebaceous glands of mammals

salivary glands of vertebrates

3.Radical vascular bundles are those in which

xylem is surrounded by phloem 

phloem is surrounded by xylem

xylem and phloem occur on the same radius 

xylem and phloem occur on the different radii

4.Organic Substances which, in very small amounts, control growth and development called

vitamins

hormones 

enzymes 

None of the above

5.Rain water helps to increase the ____ to some extent.

phosphorous contents 

nitrogen contents 

calcium contents

potash contents