Answer:
genetic engineering is possible because all organisms are based on the same. genetic code. scientists can study the effect of turning off a gene by using. gene knockout ... a ring of bacterial dna with foreign DNA inserted ... transgenic organisms can express the foreign genes because all organisms are bases on the same.
Explanation:
B. diatoms
C. green algae
D. euglenoids
E. amoeba
The answer is B. When diatoms die and fall off the ocean column to the ocean floor, they become part of sediments over time. When they are mined and exposed, they turn to a diatomite. Diatomaceous earth is significant as a pest repellant because of its hygroscopic property and has very abrasive particle hence it absorbs the water-protective fats and oils from the outermost layer of insects.
Answer:
B. diatoms
(on plato)
Increase in urbanization will lead to increase in the number of people who are living in an urban area and it will also lead to increase in development in that area. The increase in development can come in form of construction of industries, which release large amount of waste products that pollute the air. This will lead to air pollution and reduce air quality. Development can also be in form of availability of electricity, that makes it possible for people to operate different electrical gadgets such as radio and television, which can result in noise pollution. Increase in the number of people who operate motor vehicles will also lead to increase in air pollution, which is caused by fossils fuel.
Answer:
Carbon sequestration in agricultural land is the storage of carbon in the soil.
Explanation:
Carbon sequestration refers to the capture and storage of atmospheric carbon in the soil. Carbon dioxide gas is the common form of atmospheric carbon . Sufficient amount of soil carbon is important for the proper growth of vegetation in the soil.
Through the process of photosynthesis plants and trees perform biological carbon sequestration. When the number of plants and trees decreases the percentage of soil carbon decreases and percentage of carbon dioxide in the atmosphere increases. Fossil fuels are reserves of carbon in soil.
It is when they are consumed carbon changes to carbon dioxide and reach the atmosphere. When a land is converted to agricultural land the carbon content of the soil reduces.
Replenishing the carbon content can be done by following several methods like leaving the plant leftovers after harvest in the field itself, use of manure as fertilizer, planting perennial crops etc.
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