Which of the following is not a plant hormone?

• (a) Cytokinin
• (b) Auxin
• (c) Calcium
• (d) Gibberellin

Asbestos is no longer preferred for commercial use because:

• (a) It causes lung cancer
• (b) Its structures are very weak
• (c) It is not sound proof
• (d) It catches fire

Iodine is obtained from:

• (a) Gracilaria
• (b) Laminaria
• (c) Oedogonium
• (d) Spirogyra

The term Biomagnification refers to:

• (a) raising of environmental issues by man
• (b) growth of organism due to food consumption
• (c) increase in population size
• (d) increase in concentration of non-biodegradable pollutants

Which part of the world has a high density of organisms?

• (a) Grasslands
• (b) Savannah
• (c) Deciduous forests
• (d) Tropical rain forests

Hemorrhagic dengue fever is spread by:

• (a) Aedes fluviatilis
• (b) Aedes albimenus
• (c) Aedes aegyptii
• (d) Aedes meristica

Which one of the following in non-toxic?

• (a) Cadmium
• (b) Mercury
• (c) Lead
• (d) Sodium

Which of the following properties is not related to LASER?

• (a) High intensity
• (b) High coherence
• (c) High monochromaticity
• (d) High optical activity

In which form is phosphorus predominantly found in soil?

• (a) Orthophosphate
• (b) Phosphorus oxide
• (c) Phosphorous sulphide
• (d) Phosphoric acid

Carbohydrates are not used in:

• (a) Food industry
• (b) Textile industry
• (c) Cosmetic industry
• (d) Paint industry

Nanotechnology is where particles of the following size are used:

• (a) 10⁹ cm
• (b) 10^-9 m
• (c) 10^-9 cm
• (d) 10⁹ cm

Antibodies are found in:

• (a) Platelets
• (b) RBC
• (c) Lymphocytes
• (d) Eosinophils

Night-blindness is caused by the deficiency of:

• (a) Vitamin A
• (b) Vitamin B6
• (c) Vitamin B12
• (d) Vitamin C

Human eye is sensitive to wavelength it’s the range of:

• (a) 300-390 nm
• (b) 300-360 nm
• (c) 380-760 nm
• (d) 790-800 nm