Industrial melanism in peppered moth is an example for:

 (1) Acid rains
 (2) Skin disease
 (3) Natural selection in action
 (4) Conversation

The celluler structure which always disappears during mitosis is
1. mitochondria
2. nuclear membrance
3. plastids
4. plasma membrance

The Casparian bands found in the endodermal cells of roots are made up of
 
1) cellulose
2) suberin and lignin
3) lignin     
4) cutin

Sigmoid or S shaped growth curve is useful to explain 
1. Growth in man, animals & plants 
2. Population growth 
3. Growth of industries 
4. All of these

Where does Wuchereria bancrofti lodge and accmulate in the human body ?
1. Lung
2. Intestine
3. Lymphatic vessels
4. Liver

Loss of one pair of homologous chromosomes from a diploid set is called
 1) Monosomy
 2) Trisomy
 3) Monoploidy
 4) Nullisomy

When peacock eats snakes which eat insects thriving on green plants the peacock is

1) a primary consumer
2) a primary decomposer
3) final decomposer
4) the apex of the food pyramid

The spines on the tough rind of Jackfruit represents

 1) Carpel
 2) Filament
 3) Stigma
 4) Style

Which process provides most of the oxygen found in Earth's atmosphere?

1. photosynthesis
2. aerobic respiration
3. dehydration synthesis
4. fermentation

 An egg in which the yolk is concentrated towards one pole is called

 1. telolecithal
 2. centrolecithal
 3. isolecithal
 4. mesolecithal