Biology-Objective Related Question Answers
801. Excess amount of fluoride in drinking water causes?
skeletal flurosis
802. According to WHO; the safe noise level for a city is?
45dB
803. World environment day is celebrated on?
5th June
804. International Earth day is celebrated?
22nd April
805. Ozone day is celebrated on?
16th September
806. World water day is on?
22nd March
807. Quantity of CO2 in the atmosphere is?
0.03%
808. Acid rain is due to?
Sulphur dioxide (SO2) pollution
809. Taj Mahal is threatened due to the effect of?
SO2
810. DDT is a non - biodegrable?
pollutant
811. Largest ecosystem of the world are?
Oceans
812. Which food factor is essential for the building of new tissues?
Protein
813. Which are the protective regulating food factors?
Minerals and Vitamins
814. How can we prevent goitre?
By using iodised salt
815. How are fats absorbed into the body?
Fats are absorbed to the body in the form of fatty acids and glycerol
816. Why Iodised salt is used with food?
To make up for the deficiency of iodine
817. Which element helps to strengthen the enamel in teeth?
Fluorine
818. What are the water soluble vitamins?
B and C
819. Which factor is essential for the production of thyroxin?
Iodine
820. Which Vitamin is obtained from unpolished rice?
Thiamine
821. Name five vitamins produced in our body?
Biotin; Pandothenic acid; Niacin; Vitamin D and Vitamin K
822. What is clean energy?
Renewable energy is also known as clean energy because it cannot produce pollution. Renewable energy is energy which comes from natural resources such as sunlight; wind; rain; tides; and geothermal heat; which are renewable?
823. What is EUTROPHICATION?
When fresh water is artificially supplemented with nutrients; it results in abnormal increase in the growth of water plants. This is known as eutrophication. When organic matter exceeds the capacity of the micro- organisms in water that break down and recycle the organic matter; it encourages rapid growths of algae. This is known as algal bloom. When they die; the remains of algae add to the organic wastes already existing in water. Eventually water becomes deficient in oxygen. This increases BO
824. What is the fatty content that may get deposited inside the blood vessels?
Cholestrol
825. Which are the two components of fat?
Fatty acid and glycerol
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