Biology miscellaneous
- Commercially valued cork is obtained from :
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Cork is a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber. It is endemic to the Mediterranean region. Cork is composed of suberin, a hydrophobic substance and, because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products, such as wine stoppers.
Correct Option: A
Cork is a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber. It is endemic to the Mediterranean region. Cork is composed of suberin, a hydrophobic substance and, because of its impermeable, buoyant, elastic, and fire retardant properties, it is used in a variety of products, such as wine stoppers.
- Minamata disease is caused by pollution of water by :
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Minamata disease is a neurological syndrome caused by severe mercury poisoning. The disease was first discovered in Minamata City in Kumamoto prefecture, Japan in 1956. It was caused by the release of methyl mercury in the industrial wastewater (point source pollution) from the Chisso Corporation's chemical factory, which continued from 1932 to 1968.
Correct Option: D
Minamata disease is a neurological syndrome caused by severe mercury poisoning. The disease was first discovered in Minamata City in Kumamoto prefecture, Japan in 1956. It was caused by the release of methyl mercury in the industrial wastewater (point source pollution) from the Chisso Corporation's chemical factory, which continued from 1932 to 1968.
- Christmas factor is involved in :
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Factor IX, also known as Christmas factor, is one of the serine proteases of the coagulation system; it belongs to peptidase family S1. Deficiency of this protein causes hemophilia B. It was discovered in 1952 after a young boy named Stephen Christmas was found to be lacking this exact factor, leading to haemophilia.
Correct Option: A
Factor IX, also known as Christmas factor, is one of the serine proteases of the coagulation system; it belongs to peptidase family S1. Deficiency of this protein causes hemophilia B. It was discovered in 1952 after a young boy named Stephen Christmas was found to be lacking this exact factor, leading to haemophilia.
- Transpiration increases in :
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Conditions which increase the rate of evaporation also increase the rate of transpiration. Transpiration is more
rapid in hot, dry and windy conditions than it is in still or humid conditions. Plenty of light also speeds up
transpiration.Factors that affect transpiration rate Factor Description Explanation Light In bright light transpiration increases The stomata (openings in the leaf) open wider to allow more carbon dioxide into the leaf for photosynthesis. Temperature Transpiration is faster in higher temperatures Evaporation and diffusion are faster at higher temperatures Wind Transpiration is faster in windy conditions Water vapour is removed quickly by air movement, speeding up diffusion of more water vapour out of the leaf Humidity Transpiration is slower in humid conditions Diffusion of water vapour out of the leaf slows down if the leaf is already surrounded by moist air Correct Option: A
Conditions which increase the rate of evaporation also increase the rate of transpiration. Transpiration is more
rapid in hot, dry and windy conditions than it is in still or humid conditions. Plenty of light also speeds up
transpiration.Factors that affect transpiration rate Factor Description Explanation Light In bright light transpiration increases The stomata (openings in the leaf) open wider to allow more carbon dioxide into the leaf for photosynthesis. Temperature Transpiration is faster in higher temperatures Evaporation and diffusion are faster at higher temperatures Wind Transpiration is faster in windy conditions Water vapour is removed quickly by air movement, speeding up diffusion of more water vapour out of the leaf Humidity Transpiration is slower in humid conditions Diffusion of water vapour out of the leaf slows down if the leaf is already surrounded by moist air
- What is the Kyoto Protocol?
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The Kyoto Protocol is an international treaty, which extends the 1992 United Nations Framework Convention on Climate Change (UNFCCC) that commits State Parties to reduce greenhouse gases emissions, based on the premise that (a) global warming exists and (b) man-made CO2 emissions have caused it. It aims to fight global warming by reducing greenhouse gas concentrations in the atmosphere. The treaty was negotiated in December 1997 at the city of Kyoto, Japan and came into force on February 16, 2005.
Correct Option: D
The Kyoto Protocol is an international treaty, which extends the 1992 United Nations Framework Convention on Climate Change (UNFCCC) that commits State Parties to reduce greenhouse gases emissions, based on the premise that (a) global warming exists and (b) man-made CO2 emissions have caused it. It aims to fight global warming by reducing greenhouse gas concentrations in the atmosphere. The treaty was negotiated in December 1997 at the city of Kyoto, Japan and came into force on February 16, 2005.
