Ripening of fruits is hastened by

 1) Auxin

 2) Ethylene

 3) Gibberellic acid

 4) Cytokinins

Ascending order of ecological units in the increasing order of complexity are:

 (1)Population,  Community, Species,  Ecosystem, Biosphe  Biome.
 (2)Biome, Biosphere,  Ecosystem,Comminity,  Population, Species.
 (3) Community,  Population, species,  Biosphere,  Ecosystem, Biome.
 (4)Species, Population,  Community,  Ecosystem, Biome,  Biosphere.

Pyrethrum is
 1) Yellow dye
 2) Edible oil
 3) A drug
 4) An insecticide

The unit neasurement in transmission eletron microscope is equal to
1) .001 um
2) .00001 um
3) .01 um
4) .0001 um

The largest herbarium in the World is in
 1) Calcutta
 2) Royal Botanical Garden -- Kew
 3) America
 4) Bombay

Ribosome are the centre for
1. Respiration
2. Photosynthesis
3. Protein synthesis
4. Fat synthesis

In earthwarm blood from seminal vesicle is collected by
1. Ventral vessel
2. Dorsal vessel
3. Lateral oesophageal vessel
4. Supra- oesophageal vessel

The substance produced by sperm to dissolve egg membrane is
 1) Fertilizine
 2) Sperm lysin
 3) Anti fertilizin
 4) Hyaluronidase

Circumfluence is used for taking in food material which is

1) motile
2) non-motile
3) a liquid
4) a fat drop
 

Animal capable of both pulmonary and gill respiration is

1) Pila
2) Sepia
3) Octopus
4) Freshwater mussel