Which one of the following is a growth regulator produced by plants?
Naphthalene acetic acid
Zeatin
2,4-dichlorophenoxy acetic acid
Benzyl aminopurine
In which one of the following, expenditure of energy is required?
Osmosis
Diffusion
Active transport
Passive transport
Juvenile hormone in insect is released from
protocerebrum
corpora cardiaca
corpora allata
thoracic gland
The body of Rohu fish is covered by
cycloid scale, but the tail of homocercal
placoid scale, but the tail of heterocercal
cycloid scale, but the tail of heterocerca
placoid scale, but the tail is homocercal
Management of National Park is controlled by
State Government
Central Government
United Nations
Non-Government Organisations
Which one is an example of living fossil?
Coral
Ascidia
Octopus
King crab
D.
King crab
King crab or horse shoe crab are a superfamily of crab-like decaped crustaceans chiefly found in cold seas. They are generally thought to be derived from hermit crab (the ancestors). It is considered as a living fossil because it has been on earth for millions of years.
Objects less than 0.2 m in size cannot be see an under light microscope because
the wave length of visible light is 3900- 7800 Å
only two types of lenses are used
maximum magnifying power of ocular lens is 20 X
maximum magnifying power of objective lens is 100 X